Let's roll up our sleeves and solve this. We have 441 and we're going to multiply it by 450, essentially adding 441 to itself 450 times.
Step 1: 0 + 441 = 441
Step 2: 441 + 441 = 882
Step 3: 882 + 441 = 1323
Step 4: 1323 + 441 = 1764
Step 5: 1764 + 441 = 2205
Step 6: 2205 + 441 = 2646
Step 7: 2646 + 441 = 3087
Step 8: 3087 + 441 = 3528
Step 9: 3528 + 441 = 3969
Step 10: 3969 + 441 = 4410
Step 11: 4410 + 441 = 4851
Step 12: 4851 + 441 = 5292
Step 13: 5292 + 441 = 5733
Step 14: 5733 + 441 = 6174
Step 15: 6174 + 441 = 6615
Step 16: 6615 + 441 = 7056
Step 17: 7056 + 441 = 7497
Step 18: 7497 + 441 = 7938
Step 19: 7938 + 441 = 8379
Step 20: 8379 + 441 = 8820
Step 21: 8820 + 441 = 9261
Step 22: 9261 + 441 = 9702
Step 23: 9702 + 441 = 10143
Step 24: 10143 + 441 = 10584
Step 25: 10584 + 441 = 11025
Step 26: 11025 + 441 = 11466
Step 27: 11466 + 441 = 11907
Step 28: 11907 + 441 = 12348
Step 29: 12348 + 441 = 12789
Step 30: 12789 + 441 = 13230
Step 31: 13230 + 441 = 13671
Step 32: 13671 + 441 = 14112
Step 33: 14112 + 441 = 14553
Step 34: 14553 + 441 = 14994
Step 35: 14994 + 441 = 15435
Step 36: 15435 + 441 = 15876
Step 37: 15876 + 441 = 16317
Step 38: 16317 + 441 = 16758
Step 39: 16758 + 441 = 17199
Step 40: 17199 + 441 = 17640
Step 41: 17640 + 441 = 18081
Step 42: 18081 + 441 = 18522
Step 43: 18522 + 441 = 18963
Step 44: 18963 + 441 = 19404
Step 45: 19404 + 441 = 19845
Step 46: 19845 + 441 = 20286
Step 47: 20286 + 441 = 20727
Step 48: 20727 + 441 = 21168
Step 49: 21168 + 441 = 21609
Step 50: 21609 + 441 = 22050
Step 51: 22050 + 441 = 22491
Step 52: 22491 + 441 = 22932
Step 53: 22932 + 441 = 23373
Step 54: 23373 + 441 = 23814
Step 55: 23814 + 441 = 24255
Step 56: 24255 + 441 = 24696
Step 57: 24696 + 441 = 25137
Step 58: 25137 + 441 = 25578
Step 59: 25578 + 441 = 26019
Step 60: 26019 + 441 = 26460
Step 61: 26460 + 441 = 26901
Step 62: 26901 + 441 = 27342
Step 63: 27342 + 441 = 27783
Step 64: 27783 + 441 = 28224
Step 65: 28224 + 441 = 28665
Step 66: 28665 + 441 = 29106
Step 67: 29106 + 441 = 29547
Step 68: 29547 + 441 = 29988
Step 69: 29988 + 441 = 30429
Step 70: 30429 + 441 = 30870
Step 71: 30870 + 441 = 31311
Step 72: 31311 + 441 = 31752
Step 73: 31752 + 441 = 32193
Step 74: 32193 + 441 = 32634
Step 75: 32634 + 441 = 33075
Step 76: 33075 + 441 = 33516
Step 77: 33516 + 441 = 33957
Step 78: 33957 + 441 = 34398
Step 79: 34398 + 441 = 34839
Step 80: 34839 + 441 = 35280
Step 81: 35280 + 441 = 35721
Step 82: 35721 + 441 = 36162
Step 83: 36162 + 441 = 36603
Step 84: 36603 + 441 = 37044
Step 85: 37044 + 441 = 37485
Step 86: 37485 + 441 = 37926
Step 87: 37926 + 441 = 38367
Step 88: 38367 + 441 = 38808
Step 89: 38808 + 441 = 39249
Step 90: 39249 + 441 = 39690
Step 91: 39690 + 441 = 40131
Step 92: 40131 + 441 = 40572
Step 93: 40572 + 441 = 41013
Step 94: 41013 + 441 = 41454
Step 95: 41454 + 441 = 41895
Step 96: 41895 + 441 = 42336
Step 97: 42336 + 441 = 42777
Step 98: 42777 + 441 = 43218
Step 99: 43218 + 441 = 43659
Step 100: 43659 + 441 = 44100
Step 101: 44100 + 441 = 44541
Step 102: 44541 + 441 = 44982
Step 103: 44982 + 441 = 45423
Step 104: 45423 + 441 = 45864
Step 105: 45864 + 441 = 46305
Step 106: 46305 + 441 = 46746
Step 107: 46746 + 441 = 47187
Step 108: 47187 + 441 = 47628
Step 109: 47628 + 441 = 48069
Step 110: 48069 + 441 = 48510
Step 111: 48510 + 441 = 48951
Step 112: 48951 + 441 = 49392
Step 113: 49392 + 441 = 49833
Step 114: 49833 + 441 = 50274
Step 115: 50274 + 441 = 50715
Step 116: 50715 + 441 = 51156
Step 117: 51156 + 441 = 51597
Step 118: 51597 + 441 = 52038
Step 119: 52038 + 441 = 52479
Step 120: 52479 + 441 = 52920
Step 121: 52920 + 441 = 53361
Step 122: 53361 + 441 = 53802
Step 123: 53802 + 441 = 54243
Step 124: 54243 + 441 = 54684
Step 125: 54684 + 441 = 55125
Step 126: 55125 + 441 = 55566
Step 127: 55566 + 441 = 56007
Step 128: 56007 + 441 = 56448
Step 129: 56448 + 441 = 56889
Step 130: 56889 + 441 = 57330
Step 131: 57330 + 441 = 57771
Step 132: 57771 + 441 = 58212
Step 133: 58212 + 441 = 58653
Step 134: 58653 + 441 = 59094
Step 135: 59094 + 441 = 59535
Step 136: 59535 + 441 = 59976
Step 137: 59976 + 441 = 60417
Step 138: 60417 + 441 = 60858
Step 139: 60858 + 441 = 61299
Step 140: 61299 + 441 = 61740
Step 141: 61740 + 441 = 62181
Step 142: 62181 + 441 = 62622
Step 143: 62622 + 441 = 63063
Step 144: 63063 + 441 = 63504
Step 145: 63504 + 441 = 63945
Step 146: 63945 + 441 = 64386
Step 147: 64386 + 441 = 64827
Step 148: 64827 + 441 = 65268
Step 149: 65268 + 441 = 65709
Step 150: 65709 + 441 = 66150
Step 151: 66150 + 441 = 66591
Step 152: 66591 + 441 = 67032
Step 153: 67032 + 441 = 67473
Step 154: 67473 + 441 = 67914
Step 155: 67914 + 441 = 68355
Step 156: 68355 + 441 = 68796
Step 157: 68796 + 441 = 69237
Step 158: 69237 + 441 = 69678
Step 159: 69678 + 441 = 70119
Step 160: 70119 + 441 = 70560
Step 161: 70560 + 441 = 71001
Step 162: 71001 + 441 = 71442
Step 163: 71442 + 441 = 71883
Step 164: 71883 + 441 = 72324
Step 165: 72324 + 441 = 72765
Step 166: 72765 + 441 = 73206
Step 167: 73206 + 441 = 73647
Step 168: 73647 + 441 = 74088
Step 169: 74088 + 441 = 74529
Step 170: 74529 + 441 = 74970
Step 171: 74970 + 441 = 75411
Step 172: 75411 + 441 = 75852
Step 173: 75852 + 441 = 76293
Step 174: 76293 + 441 = 76734
Step 175: 76734 + 441 = 77175
Step 176: 77175 + 441 = 77616
Step 177: 77616 + 441 = 78057
Step 178: 78057 + 441 = 78498
Step 179: 78498 + 441 = 78939
Step 180: 78939 + 441 = 79380
Step 181: 79380 + 441 = 79821
Step 182: 79821 + 441 = 80262
Step 183: 80262 + 441 = 80703
Step 184: 80703 + 441 = 81144
Step 185: 81144 + 441 = 81585
Step 186: 81585 + 441 = 82026
Step 187: 82026 + 441 = 82467
Step 188: 82467 + 441 = 82908
Step 189: 82908 + 441 = 83349
Step 190: 83349 + 441 = 83790
Step 191: 83790 + 441 = 84231
Step 192: 84231 + 441 = 84672
Step 193: 84672 + 441 = 85113
Step 194: 85113 + 441 = 85554
Step 195: 85554 + 441 = 85995
Step 196: 85995 + 441 = 86436
Step 197: 86436 + 441 = 86877
Step 198: 86877 + 441 = 87318
Step 199: 87318 + 441 = 87759
Step 200: 87759 + 441 = 88200
Step 201: 88200 + 441 = 88641
Step 202: 88641 + 441 = 89082
Step 203: 89082 + 441 = 89523
Step 204: 89523 + 441 = 89964
Step 205: 89964 + 441 = 90405
Step 206: 90405 + 441 = 90846
Step 207: 90846 + 441 = 91287
Step 208: 91287 + 441 = 91728
Step 209: 91728 + 441 = 92169
Step 210: 92169 + 441 = 92610
Step 211: 92610 + 441 = 93051
Step 212: 93051 + 441 = 93492
Step 213: 93492 + 441 = 93933
Step 214: 93933 + 441 = 94374
Step 215: 94374 + 441 = 94815
Step 216: 94815 + 441 = 95256
Step 217: 95256 + 441 = 95697
Step 218: 95697 + 441 = 96138
Step 219: 96138 + 441 = 96579
Step 220: 96579 + 441 = 97020
Step 221: 97020 + 441 = 97461
Step 222: 97461 + 441 = 97902
Step 223: 97902 + 441 = 98343
Step 224: 98343 + 441 = 98784
Step 225: 98784 + 441 = 99225
Step 226: 99225 + 441 = 99666
Step 227: 99666 + 441 = 100107
Step 228: 100107 + 441 = 100548
Step 229: 100548 + 441 = 100989
Step 230: 100989 + 441 = 101430
Step 231: 101430 + 441 = 101871
Step 232: 101871 + 441 = 102312
Step 233: 102312 + 441 = 102753
Step 234: 102753 + 441 = 103194
Step 235: 103194 + 441 = 103635
Step 236: 103635 + 441 = 104076
Step 237: 104076 + 441 = 104517
Step 238: 104517 + 441 = 104958
Step 239: 104958 + 441 = 105399
Step 240: 105399 + 441 = 105840
Step 241: 105840 + 441 = 106281
Step 242: 106281 + 441 = 106722
Step 243: 106722 + 441 = 107163
Step 244: 107163 + 441 = 107604
Step 245: 107604 + 441 = 108045
Step 246: 108045 + 441 = 108486
Step 247: 108486 + 441 = 108927
Step 248: 108927 + 441 = 109368
Step 249: 109368 + 441 = 109809
Step 250: 109809 + 441 = 110250
Step 251: 110250 + 441 = 110691
Step 252: 110691 + 441 = 111132
Step 253: 111132 + 441 = 111573
Step 254: 111573 + 441 = 112014
Step 255: 112014 + 441 = 112455
Step 256: 112455 + 441 = 112896
Step 257: 112896 + 441 = 113337
Step 258: 113337 + 441 = 113778
Step 259: 113778 + 441 = 114219
Step 260: 114219 + 441 = 114660
Step 261: 114660 + 441 = 115101
Step 262: 115101 + 441 = 115542
Step 263: 115542 + 441 = 115983
Step 264: 115983 + 441 = 116424
Step 265: 116424 + 441 = 116865
Step 266: 116865 + 441 = 117306
Step 267: 117306 + 441 = 117747
Step 268: 117747 + 441 = 118188
Step 269: 118188 + 441 = 118629
Step 270: 118629 + 441 = 119070
Step 271: 119070 + 441 = 119511
Step 272: 119511 + 441 = 119952
Step 273: 119952 + 441 = 120393
Step 274: 120393 + 441 = 120834
Step 275: 120834 + 441 = 121275
Step 276: 121275 + 441 = 121716
Step 277: 121716 + 441 = 122157
Step 278: 122157 + 441 = 122598
Step 279: 122598 + 441 = 123039
Step 280: 123039 + 441 = 123480
Step 281: 123480 + 441 = 123921
Step 282: 123921 + 441 = 124362
Step 283: 124362 + 441 = 124803
Step 284: 124803 + 441 = 125244
Step 285: 125244 + 441 = 125685
Step 286: 125685 + 441 = 126126
Step 287: 126126 + 441 = 126567
Step 288: 126567 + 441 = 127008
Step 289: 127008 + 441 = 127449
Step 290: 127449 + 441 = 127890
Step 291: 127890 + 441 = 128331
Step 292: 128331 + 441 = 128772
Step 293: 128772 + 441 = 129213
Step 294: 129213 + 441 = 129654
Step 295: 129654 + 441 = 130095
Step 296: 130095 + 441 = 130536
Step 297: 130536 + 441 = 130977
Step 298: 130977 + 441 = 131418
Step 299: 131418 + 441 = 131859
Step 300: 131859 + 441 = 132300
Step 301: 132300 + 441 = 132741
Step 302: 132741 + 441 = 133182
Step 303: 133182 + 441 = 133623
Step 304: 133623 + 441 = 134064
Step 305: 134064 + 441 = 134505
Step 306: 134505 + 441 = 134946
Step 307: 134946 + 441 = 135387
Step 308: 135387 + 441 = 135828
Step 309: 135828 + 441 = 136269
Step 310: 136269 + 441 = 136710
Step 311: 136710 + 441 = 137151
Step 312: 137151 + 441 = 137592
Step 313: 137592 + 441 = 138033
Step 314: 138033 + 441 = 138474
Step 315: 138474 + 441 = 138915
Step 316: 138915 + 441 = 139356
Step 317: 139356 + 441 = 139797
Step 318: 139797 + 441 = 140238
Step 319: 140238 + 441 = 140679
Step 320: 140679 + 441 = 141120
Step 321: 141120 + 441 = 141561
Step 322: 141561 + 441 = 142002
Step 323: 142002 + 441 = 142443
Step 324: 142443 + 441 = 142884
Step 325: 142884 + 441 = 143325
Step 326: 143325 + 441 = 143766
Step 327: 143766 + 441 = 144207
Step 328: 144207 + 441 = 144648
Step 329: 144648 + 441 = 145089
Step 330: 145089 + 441 = 145530
Step 331: 145530 + 441 = 145971
Step 332: 145971 + 441 = 146412
Step 333: 146412 + 441 = 146853
Step 334: 146853 + 441 = 147294
Step 335: 147294 + 441 = 147735
Step 336: 147735 + 441 = 148176
Step 337: 148176 + 441 = 148617
Step 338: 148617 + 441 = 149058
Step 339: 149058 + 441 = 149499
Step 340: 149499 + 441 = 149940
Step 341: 149940 + 441 = 150381
Step 342: 150381 + 441 = 150822
Step 343: 150822 + 441 = 151263
Step 344: 151263 + 441 = 151704
Step 345: 151704 + 441 = 152145
Step 346: 152145 + 441 = 152586
Step 347: 152586 + 441 = 153027
Step 348: 153027 + 441 = 153468
Step 349: 153468 + 441 = 153909
Step 350: 153909 + 441 = 154350
Step 351: 154350 + 441 = 154791
Step 352: 154791 + 441 = 155232
Step 353: 155232 + 441 = 155673
Step 354: 155673 + 441 = 156114
Step 355: 156114 + 441 = 156555
Step 356: 156555 + 441 = 156996
Step 357: 156996 + 441 = 157437
Step 358: 157437 + 441 = 157878
Step 359: 157878 + 441 = 158319
Step 360: 158319 + 441 = 158760
Step 361: 158760 + 441 = 159201
Step 362: 159201 + 441 = 159642
Step 363: 159642 + 441 = 160083
Step 364: 160083 + 441 = 160524
Step 365: 160524 + 441 = 160965
Step 366: 160965 + 441 = 161406
Step 367: 161406 + 441 = 161847
Step 368: 161847 + 441 = 162288
Step 369: 162288 + 441 = 162729
Step 370: 162729 + 441 = 163170
Step 371: 163170 + 441 = 163611
Step 372: 163611 + 441 = 164052
Step 373: 164052 + 441 = 164493
Step 374: 164493 + 441 = 164934
Step 375: 164934 + 441 = 165375
Step 376: 165375 + 441 = 165816
Step 377: 165816 + 441 = 166257
Step 378: 166257 + 441 = 166698
Step 379: 166698 + 441 = 167139
Step 380: 167139 + 441 = 167580
Step 381: 167580 + 441 = 168021
Step 382: 168021 + 441 = 168462
Step 383: 168462 + 441 = 168903
Step 384: 168903 + 441 = 169344
Step 385: 169344 + 441 = 169785
Step 386: 169785 + 441 = 170226
Step 387: 170226 + 441 = 170667
Step 388: 170667 + 441 = 171108
Step 389: 171108 + 441 = 171549
Step 390: 171549 + 441 = 171990
Step 391: 171990 + 441 = 172431
Step 392: 172431 + 441 = 172872
Step 393: 172872 + 441 = 173313
Step 394: 173313 + 441 = 173754
Step 395: 173754 + 441 = 174195
Step 396: 174195 + 441 = 174636
Step 397: 174636 + 441 = 175077
Step 398: 175077 + 441 = 175518
Step 399: 175518 + 441 = 175959
Step 400: 175959 + 441 = 176400
Step 401: 176400 + 441 = 176841
Step 402: 176841 + 441 = 177282
Step 403: 177282 + 441 = 177723
Step 404: 177723 + 441 = 178164
Step 405: 178164 + 441 = 178605
Step 406: 178605 + 441 = 179046
Step 407: 179046 + 441 = 179487
Step 408: 179487 + 441 = 179928
Step 409: 179928 + 441 = 180369
Step 410: 180369 + 441 = 180810
Step 411: 180810 + 441 = 181251
Step 412: 181251 + 441 = 181692
Step 413: 181692 + 441 = 182133
Step 414: 182133 + 441 = 182574
Step 415: 182574 + 441 = 183015
Step 416: 183015 + 441 = 183456
Step 417: 183456 + 441 = 183897
Step 418: 183897 + 441 = 184338
Step 419: 184338 + 441 = 184779
Step 420: 184779 + 441 = 185220
Step 421: 185220 + 441 = 185661
Step 422: 185661 + 441 = 186102
Step 423: 186102 + 441 = 186543
Step 424: 186543 + 441 = 186984
Step 425: 186984 + 441 = 187425
Step 426: 187425 + 441 = 187866
Step 427: 187866 + 441 = 188307
Step 428: 188307 + 441 = 188748
Step 429: 188748 + 441 = 189189
Step 430: 189189 + 441 = 189630
Step 431: 189630 + 441 = 190071
Step 432: 190071 + 441 = 190512
Step 433: 190512 + 441 = 190953
Step 434: 190953 + 441 = 191394
Step 435: 191394 + 441 = 191835
Step 436: 191835 + 441 = 192276
Step 437: 192276 + 441 = 192717
Step 438: 192717 + 441 = 193158
Step 439: 193158 + 441 = 193599
Step 440: 193599 + 441 = 194040
Step 441: 194040 + 441 = 194481
Step 442: 194481 + 441 = 194922
Step 443: 194922 + 441 = 195363
Step 444: 195363 + 441 = 195804
Step 445: 195804 + 441 = 196245
Step 446: 196245 + 441 = 196686
Step 447: 196686 + 441 = 197127
Step 448: 197127 + 441 = 197568
Step 449: 197568 + 441 = 198009
Step 450: 198009 + 441 = 198450

So, 441*450 = 198450