Alright, let's solve this math problem step by step. First, we have the number 377. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 421. So, we're going to take the number 377 and add it to itself 421 times.
Step 1: 0 + 377 = 377
Step 2: 377 + 377 = 754
Step 3: 754 + 377 = 1131
Step 4: 1131 + 377 = 1508
Step 5: 1508 + 377 = 1885
Step 6: 1885 + 377 = 2262
Step 7: 2262 + 377 = 2639
Step 8: 2639 + 377 = 3016
Step 9: 3016 + 377 = 3393
Step 10: 3393 + 377 = 3770
Step 11: 3770 + 377 = 4147
Step 12: 4147 + 377 = 4524
Step 13: 4524 + 377 = 4901
Step 14: 4901 + 377 = 5278
Step 15: 5278 + 377 = 5655
Step 16: 5655 + 377 = 6032
Step 17: 6032 + 377 = 6409
Step 18: 6409 + 377 = 6786
Step 19: 6786 + 377 = 7163
Step 20: 7163 + 377 = 7540
Step 21: 7540 + 377 = 7917
Step 22: 7917 + 377 = 8294
Step 23: 8294 + 377 = 8671
Step 24: 8671 + 377 = 9048
Step 25: 9048 + 377 = 9425
Step 26: 9425 + 377 = 9802
Step 27: 9802 + 377 = 10179
Step 28: 10179 + 377 = 10556
Step 29: 10556 + 377 = 10933
Step 30: 10933 + 377 = 11310
Step 31: 11310 + 377 = 11687
Step 32: 11687 + 377 = 12064
Step 33: 12064 + 377 = 12441
Step 34: 12441 + 377 = 12818
Step 35: 12818 + 377 = 13195
Step 36: 13195 + 377 = 13572
Step 37: 13572 + 377 = 13949
Step 38: 13949 + 377 = 14326
Step 39: 14326 + 377 = 14703
Step 40: 14703 + 377 = 15080
Step 41: 15080 + 377 = 15457
Step 42: 15457 + 377 = 15834
Step 43: 15834 + 377 = 16211
Step 44: 16211 + 377 = 16588
Step 45: 16588 + 377 = 16965
Step 46: 16965 + 377 = 17342
Step 47: 17342 + 377 = 17719
Step 48: 17719 + 377 = 18096
Step 49: 18096 + 377 = 18473
Step 50: 18473 + 377 = 18850
Step 51: 18850 + 377 = 19227
Step 52: 19227 + 377 = 19604
Step 53: 19604 + 377 = 19981
Step 54: 19981 + 377 = 20358
Step 55: 20358 + 377 = 20735
Step 56: 20735 + 377 = 21112
Step 57: 21112 + 377 = 21489
Step 58: 21489 + 377 = 21866
Step 59: 21866 + 377 = 22243
Step 60: 22243 + 377 = 22620
Step 61: 22620 + 377 = 22997
Step 62: 22997 + 377 = 23374
Step 63: 23374 + 377 = 23751
Step 64: 23751 + 377 = 24128
Step 65: 24128 + 377 = 24505
Step 66: 24505 + 377 = 24882
Step 67: 24882 + 377 = 25259
Step 68: 25259 + 377 = 25636
Step 69: 25636 + 377 = 26013
Step 70: 26013 + 377 = 26390
Step 71: 26390 + 377 = 26767
Step 72: 26767 + 377 = 27144
Step 73: 27144 + 377 = 27521
Step 74: 27521 + 377 = 27898
Step 75: 27898 + 377 = 28275
Step 76: 28275 + 377 = 28652
Step 77: 28652 + 377 = 29029
Step 78: 29029 + 377 = 29406
Step 79: 29406 + 377 = 29783
Step 80: 29783 + 377 = 30160
Step 81: 30160 + 377 = 30537
Step 82: 30537 + 377 = 30914
Step 83: 30914 + 377 = 31291
Step 84: 31291 + 377 = 31668
Step 85: 31668 + 377 = 32045
Step 86: 32045 + 377 = 32422
Step 87: 32422 + 377 = 32799
Step 88: 32799 + 377 = 33176
Step 89: 33176 + 377 = 33553
Step 90: 33553 + 377 = 33930
Step 91: 33930 + 377 = 34307
Step 92: 34307 + 377 = 34684
Step 93: 34684 + 377 = 35061
Step 94: 35061 + 377 = 35438
Step 95: 35438 + 377 = 35815
Step 96: 35815 + 377 = 36192
Step 97: 36192 + 377 = 36569
Step 98: 36569 + 377 = 36946
Step 99: 36946 + 377 = 37323
Step 100: 37323 + 377 = 37700
Step 101: 37700 + 377 = 38077
Step 102: 38077 + 377 = 38454
Step 103: 38454 + 377 = 38831
Step 104: 38831 + 377 = 39208
Step 105: 39208 + 377 = 39585
Step 106: 39585 + 377 = 39962
Step 107: 39962 + 377 = 40339
Step 108: 40339 + 377 = 40716
Step 109: 40716 + 377 = 41093
Step 110: 41093 + 377 = 41470
Step 111: 41470 + 377 = 41847
Step 112: 41847 + 377 = 42224
Step 113: 42224 + 377 = 42601
Step 114: 42601 + 377 = 42978
Step 115: 42978 + 377 = 43355
Step 116: 43355 + 377 = 43732
Step 117: 43732 + 377 = 44109
Step 118: 44109 + 377 = 44486
Step 119: 44486 + 377 = 44863
Step 120: 44863 + 377 = 45240
Step 121: 45240 + 377 = 45617
Step 122: 45617 + 377 = 45994
Step 123: 45994 + 377 = 46371
Step 124: 46371 + 377 = 46748
Step 125: 46748 + 377 = 47125
Step 126: 47125 + 377 = 47502
Step 127: 47502 + 377 = 47879
Step 128: 47879 + 377 = 48256
Step 129: 48256 + 377 = 48633
Step 130: 48633 + 377 = 49010
Step 131: 49010 + 377 = 49387
Step 132: 49387 + 377 = 49764
Step 133: 49764 + 377 = 50141
Step 134: 50141 + 377 = 50518
Step 135: 50518 + 377 = 50895
Step 136: 50895 + 377 = 51272
Step 137: 51272 + 377 = 51649
Step 138: 51649 + 377 = 52026
Step 139: 52026 + 377 = 52403
Step 140: 52403 + 377 = 52780
Step 141: 52780 + 377 = 53157
Step 142: 53157 + 377 = 53534
Step 143: 53534 + 377 = 53911
Step 144: 53911 + 377 = 54288
Step 145: 54288 + 377 = 54665
Step 146: 54665 + 377 = 55042
Step 147: 55042 + 377 = 55419
Step 148: 55419 + 377 = 55796
Step 149: 55796 + 377 = 56173
Step 150: 56173 + 377 = 56550
Step 151: 56550 + 377 = 56927
Step 152: 56927 + 377 = 57304
Step 153: 57304 + 377 = 57681
Step 154: 57681 + 377 = 58058
Step 155: 58058 + 377 = 58435
Step 156: 58435 + 377 = 58812
Step 157: 58812 + 377 = 59189
Step 158: 59189 + 377 = 59566
Step 159: 59566 + 377 = 59943
Step 160: 59943 + 377 = 60320
Step 161: 60320 + 377 = 60697
Step 162: 60697 + 377 = 61074
Step 163: 61074 + 377 = 61451
Step 164: 61451 + 377 = 61828
Step 165: 61828 + 377 = 62205
Step 166: 62205 + 377 = 62582
Step 167: 62582 + 377 = 62959
Step 168: 62959 + 377 = 63336
Step 169: 63336 + 377 = 63713
Step 170: 63713 + 377 = 64090
Step 171: 64090 + 377 = 64467
Step 172: 64467 + 377 = 64844
Step 173: 64844 + 377 = 65221
Step 174: 65221 + 377 = 65598
Step 175: 65598 + 377 = 65975
Step 176: 65975 + 377 = 66352
Step 177: 66352 + 377 = 66729
Step 178: 66729 + 377 = 67106
Step 179: 67106 + 377 = 67483
Step 180: 67483 + 377 = 67860
Step 181: 67860 + 377 = 68237
Step 182: 68237 + 377 = 68614
Step 183: 68614 + 377 = 68991
Step 184: 68991 + 377 = 69368
Step 185: 69368 + 377 = 69745
Step 186: 69745 + 377 = 70122
Step 187: 70122 + 377 = 70499
Step 188: 70499 + 377 = 70876
Step 189: 70876 + 377 = 71253
Step 190: 71253 + 377 = 71630
Step 191: 71630 + 377 = 72007
Step 192: 72007 + 377 = 72384
Step 193: 72384 + 377 = 72761
Step 194: 72761 + 377 = 73138
Step 195: 73138 + 377 = 73515
Step 196: 73515 + 377 = 73892
Step 197: 73892 + 377 = 74269
Step 198: 74269 + 377 = 74646
Step 199: 74646 + 377 = 75023
Step 200: 75023 + 377 = 75400
Step 201: 75400 + 377 = 75777
Step 202: 75777 + 377 = 76154
Step 203: 76154 + 377 = 76531
Step 204: 76531 + 377 = 76908
Step 205: 76908 + 377 = 77285
Step 206: 77285 + 377 = 77662
Step 207: 77662 + 377 = 78039
Step 208: 78039 + 377 = 78416
Step 209: 78416 + 377 = 78793
Step 210: 78793 + 377 = 79170
Step 211: 79170 + 377 = 79547
Step 212: 79547 + 377 = 79924
Step 213: 79924 + 377 = 80301
Step 214: 80301 + 377 = 80678
Step 215: 80678 + 377 = 81055
Step 216: 81055 + 377 = 81432
Step 217: 81432 + 377 = 81809
Step 218: 81809 + 377 = 82186
Step 219: 82186 + 377 = 82563
Step 220: 82563 + 377 = 82940
Step 221: 82940 + 377 = 83317
Step 222: 83317 + 377 = 83694
Step 223: 83694 + 377 = 84071
Step 224: 84071 + 377 = 84448
Step 225: 84448 + 377 = 84825
Step 226: 84825 + 377 = 85202
Step 227: 85202 + 377 = 85579
Step 228: 85579 + 377 = 85956
Step 229: 85956 + 377 = 86333
Step 230: 86333 + 377 = 86710
Step 231: 86710 + 377 = 87087
Step 232: 87087 + 377 = 87464
Step 233: 87464 + 377 = 87841
Step 234: 87841 + 377 = 88218
Step 235: 88218 + 377 = 88595
Step 236: 88595 + 377 = 88972
Step 237: 88972 + 377 = 89349
Step 238: 89349 + 377 = 89726
Step 239: 89726 + 377 = 90103
Step 240: 90103 + 377 = 90480
Step 241: 90480 + 377 = 90857
Step 242: 90857 + 377 = 91234
Step 243: 91234 + 377 = 91611
Step 244: 91611 + 377 = 91988
Step 245: 91988 + 377 = 92365
Step 246: 92365 + 377 = 92742
Step 247: 92742 + 377 = 93119
Step 248: 93119 + 377 = 93496
Step 249: 93496 + 377 = 93873
Step 250: 93873 + 377 = 94250
Step 251: 94250 + 377 = 94627
Step 252: 94627 + 377 = 95004
Step 253: 95004 + 377 = 95381
Step 254: 95381 + 377 = 95758
Step 255: 95758 + 377 = 96135
Step 256: 96135 + 377 = 96512
Step 257: 96512 + 377 = 96889
Step 258: 96889 + 377 = 97266
Step 259: 97266 + 377 = 97643
Step 260: 97643 + 377 = 98020
Step 261: 98020 + 377 = 98397
Step 262: 98397 + 377 = 98774
Step 263: 98774 + 377 = 99151
Step 264: 99151 + 377 = 99528
Step 265: 99528 + 377 = 99905
Step 266: 99905 + 377 = 100282
Step 267: 100282 + 377 = 100659
Step 268: 100659 + 377 = 101036
Step 269: 101036 + 377 = 101413
Step 270: 101413 + 377 = 101790
Step 271: 101790 + 377 = 102167
Step 272: 102167 + 377 = 102544
Step 273: 102544 + 377 = 102921
Step 274: 102921 + 377 = 103298
Step 275: 103298 + 377 = 103675
Step 276: 103675 + 377 = 104052
Step 277: 104052 + 377 = 104429
Step 278: 104429 + 377 = 104806
Step 279: 104806 + 377 = 105183
Step 280: 105183 + 377 = 105560
Step 281: 105560 + 377 = 105937
Step 282: 105937 + 377 = 106314
Step 283: 106314 + 377 = 106691
Step 284: 106691 + 377 = 107068
Step 285: 107068 + 377 = 107445
Step 286: 107445 + 377 = 107822
Step 287: 107822 + 377 = 108199
Step 288: 108199 + 377 = 108576
Step 289: 108576 + 377 = 108953
Step 290: 108953 + 377 = 109330
Step 291: 109330 + 377 = 109707
Step 292: 109707 + 377 = 110084
Step 293: 110084 + 377 = 110461
Step 294: 110461 + 377 = 110838
Step 295: 110838 + 377 = 111215
Step 296: 111215 + 377 = 111592
Step 297: 111592 + 377 = 111969
Step 298: 111969 + 377 = 112346
Step 299: 112346 + 377 = 112723
Step 300: 112723 + 377 = 113100
Step 301: 113100 + 377 = 113477
Step 302: 113477 + 377 = 113854
Step 303: 113854 + 377 = 114231
Step 304: 114231 + 377 = 114608
Step 305: 114608 + 377 = 114985
Step 306: 114985 + 377 = 115362
Step 307: 115362 + 377 = 115739
Step 308: 115739 + 377 = 116116
Step 309: 116116 + 377 = 116493
Step 310: 116493 + 377 = 116870
Step 311: 116870 + 377 = 117247
Step 312: 117247 + 377 = 117624
Step 313: 117624 + 377 = 118001
Step 314: 118001 + 377 = 118378
Step 315: 118378 + 377 = 118755
Step 316: 118755 + 377 = 119132
Step 317: 119132 + 377 = 119509
Step 318: 119509 + 377 = 119886
Step 319: 119886 + 377 = 120263
Step 320: 120263 + 377 = 120640
Step 321: 120640 + 377 = 121017
Step 322: 121017 + 377 = 121394
Step 323: 121394 + 377 = 121771
Step 324: 121771 + 377 = 122148
Step 325: 122148 + 377 = 122525
Step 326: 122525 + 377 = 122902
Step 327: 122902 + 377 = 123279
Step 328: 123279 + 377 = 123656
Step 329: 123656 + 377 = 124033
Step 330: 124033 + 377 = 124410
Step 331: 124410 + 377 = 124787
Step 332: 124787 + 377 = 125164
Step 333: 125164 + 377 = 125541
Step 334: 125541 + 377 = 125918
Step 335: 125918 + 377 = 126295
Step 336: 126295 + 377 = 126672
Step 337: 126672 + 377 = 127049
Step 338: 127049 + 377 = 127426
Step 339: 127426 + 377 = 127803
Step 340: 127803 + 377 = 128180
Step 341: 128180 + 377 = 128557
Step 342: 128557 + 377 = 128934
Step 343: 128934 + 377 = 129311
Step 344: 129311 + 377 = 129688
Step 345: 129688 + 377 = 130065
Step 346: 130065 + 377 = 130442
Step 347: 130442 + 377 = 130819
Step 348: 130819 + 377 = 131196
Step 349: 131196 + 377 = 131573
Step 350: 131573 + 377 = 131950
Step 351: 131950 + 377 = 132327
Step 352: 132327 + 377 = 132704
Step 353: 132704 + 377 = 133081
Step 354: 133081 + 377 = 133458
Step 355: 133458 + 377 = 133835
Step 356: 133835 + 377 = 134212
Step 357: 134212 + 377 = 134589
Step 358: 134589 + 377 = 134966
Step 359: 134966 + 377 = 135343
Step 360: 135343 + 377 = 135720
Step 361: 135720 + 377 = 136097
Step 362: 136097 + 377 = 136474
Step 363: 136474 + 377 = 136851
Step 364: 136851 + 377 = 137228
Step 365: 137228 + 377 = 137605
Step 366: 137605 + 377 = 137982
Step 367: 137982 + 377 = 138359
Step 368: 138359 + 377 = 138736
Step 369: 138736 + 377 = 139113
Step 370: 139113 + 377 = 139490
Step 371: 139490 + 377 = 139867
Step 372: 139867 + 377 = 140244
Step 373: 140244 + 377 = 140621
Step 374: 140621 + 377 = 140998
Step 375: 140998 + 377 = 141375
Step 376: 141375 + 377 = 141752
Step 377: 141752 + 377 = 142129
Step 378: 142129 + 377 = 142506
Step 379: 142506 + 377 = 142883
Step 380: 142883 + 377 = 143260
Step 381: 143260 + 377 = 143637
Step 382: 143637 + 377 = 144014
Step 383: 144014 + 377 = 144391
Step 384: 144391 + 377 = 144768
Step 385: 144768 + 377 = 145145
Step 386: 145145 + 377 = 145522
Step 387: 145522 + 377 = 145899
Step 388: 145899 + 377 = 146276
Step 389: 146276 + 377 = 146653
Step 390: 146653 + 377 = 147030
Step 391: 147030 + 377 = 147407
Step 392: 147407 + 377 = 147784
Step 393: 147784 + 377 = 148161
Step 394: 148161 + 377 = 148538
Step 395: 148538 + 377 = 148915
Step 396: 148915 + 377 = 149292
Step 397: 149292 + 377 = 149669
Step 398: 149669 + 377 = 150046
Step 399: 150046 + 377 = 150423
Step 400: 150423 + 377 = 150800
Step 401: 150800 + 377 = 151177
Step 402: 151177 + 377 = 151554
Step 403: 151554 + 377 = 151931
Step 404: 151931 + 377 = 152308
Step 405: 152308 + 377 = 152685
Step 406: 152685 + 377 = 153062
Step 407: 153062 + 377 = 153439
Step 408: 153439 + 377 = 153816
Step 409: 153816 + 377 = 154193
Step 410: 154193 + 377 = 154570
Step 411: 154570 + 377 = 154947
Step 412: 154947 + 377 = 155324
Step 413: 155324 + 377 = 155701
Step 414: 155701 + 377 = 156078
Step 415: 156078 + 377 = 156455
Step 416: 156455 + 377 = 156832
Step 417: 156832 + 377 = 157209
Step 418: 157209 + 377 = 157586
Step 419: 157586 + 377 = 157963
Step 420: 157963 + 377 = 158340
Step 421: 158340 + 377 = 158717

So, 377*421 = 158717