Let's get this math done. We have 495 and we're going to multiply it by 420. This is the same as taking 495 and adding it to itself 420 times.
Step 1: 0 + 495 = 495
Step 2: 495 + 495 = 990
Step 3: 990 + 495 = 1485
Step 4: 1485 + 495 = 1980
Step 5: 1980 + 495 = 2475
Step 6: 2475 + 495 = 2970
Step 7: 2970 + 495 = 3465
Step 8: 3465 + 495 = 3960
Step 9: 3960 + 495 = 4455
Step 10: 4455 + 495 = 4950
Step 11: 4950 + 495 = 5445
Step 12: 5445 + 495 = 5940
Step 13: 5940 + 495 = 6435
Step 14: 6435 + 495 = 6930
Step 15: 6930 + 495 = 7425
Step 16: 7425 + 495 = 7920
Step 17: 7920 + 495 = 8415
Step 18: 8415 + 495 = 8910
Step 19: 8910 + 495 = 9405
Step 20: 9405 + 495 = 9900
Step 21: 9900 + 495 = 10395
Step 22: 10395 + 495 = 10890
Step 23: 10890 + 495 = 11385
Step 24: 11385 + 495 = 11880
Step 25: 11880 + 495 = 12375
Step 26: 12375 + 495 = 12870
Step 27: 12870 + 495 = 13365
Step 28: 13365 + 495 = 13860
Step 29: 13860 + 495 = 14355
Step 30: 14355 + 495 = 14850
Step 31: 14850 + 495 = 15345
Step 32: 15345 + 495 = 15840
Step 33: 15840 + 495 = 16335
Step 34: 16335 + 495 = 16830
Step 35: 16830 + 495 = 17325
Step 36: 17325 + 495 = 17820
Step 37: 17820 + 495 = 18315
Step 38: 18315 + 495 = 18810
Step 39: 18810 + 495 = 19305
Step 40: 19305 + 495 = 19800
Step 41: 19800 + 495 = 20295
Step 42: 20295 + 495 = 20790
Step 43: 20790 + 495 = 21285
Step 44: 21285 + 495 = 21780
Step 45: 21780 + 495 = 22275
Step 46: 22275 + 495 = 22770
Step 47: 22770 + 495 = 23265
Step 48: 23265 + 495 = 23760
Step 49: 23760 + 495 = 24255
Step 50: 24255 + 495 = 24750
Step 51: 24750 + 495 = 25245
Step 52: 25245 + 495 = 25740
Step 53: 25740 + 495 = 26235
Step 54: 26235 + 495 = 26730
Step 55: 26730 + 495 = 27225
Step 56: 27225 + 495 = 27720
Step 57: 27720 + 495 = 28215
Step 58: 28215 + 495 = 28710
Step 59: 28710 + 495 = 29205
Step 60: 29205 + 495 = 29700
Step 61: 29700 + 495 = 30195
Step 62: 30195 + 495 = 30690
Step 63: 30690 + 495 = 31185
Step 64: 31185 + 495 = 31680
Step 65: 31680 + 495 = 32175
Step 66: 32175 + 495 = 32670
Step 67: 32670 + 495 = 33165
Step 68: 33165 + 495 = 33660
Step 69: 33660 + 495 = 34155
Step 70: 34155 + 495 = 34650
Step 71: 34650 + 495 = 35145
Step 72: 35145 + 495 = 35640
Step 73: 35640 + 495 = 36135
Step 74: 36135 + 495 = 36630
Step 75: 36630 + 495 = 37125
Step 76: 37125 + 495 = 37620
Step 77: 37620 + 495 = 38115
Step 78: 38115 + 495 = 38610
Step 79: 38610 + 495 = 39105
Step 80: 39105 + 495 = 39600
Step 81: 39600 + 495 = 40095
Step 82: 40095 + 495 = 40590
Step 83: 40590 + 495 = 41085
Step 84: 41085 + 495 = 41580
Step 85: 41580 + 495 = 42075
Step 86: 42075 + 495 = 42570
Step 87: 42570 + 495 = 43065
Step 88: 43065 + 495 = 43560
Step 89: 43560 + 495 = 44055
Step 90: 44055 + 495 = 44550
Step 91: 44550 + 495 = 45045
Step 92: 45045 + 495 = 45540
Step 93: 45540 + 495 = 46035
Step 94: 46035 + 495 = 46530
Step 95: 46530 + 495 = 47025
Step 96: 47025 + 495 = 47520
Step 97: 47520 + 495 = 48015
Step 98: 48015 + 495 = 48510
Step 99: 48510 + 495 = 49005
Step 100: 49005 + 495 = 49500
Step 101: 49500 + 495 = 49995
Step 102: 49995 + 495 = 50490
Step 103: 50490 + 495 = 50985
Step 104: 50985 + 495 = 51480
Step 105: 51480 + 495 = 51975
Step 106: 51975 + 495 = 52470
Step 107: 52470 + 495 = 52965
Step 108: 52965 + 495 = 53460
Step 109: 53460 + 495 = 53955
Step 110: 53955 + 495 = 54450
Step 111: 54450 + 495 = 54945
Step 112: 54945 + 495 = 55440
Step 113: 55440 + 495 = 55935
Step 114: 55935 + 495 = 56430
Step 115: 56430 + 495 = 56925
Step 116: 56925 + 495 = 57420
Step 117: 57420 + 495 = 57915
Step 118: 57915 + 495 = 58410
Step 119: 58410 + 495 = 58905
Step 120: 58905 + 495 = 59400
Step 121: 59400 + 495 = 59895
Step 122: 59895 + 495 = 60390
Step 123: 60390 + 495 = 60885
Step 124: 60885 + 495 = 61380
Step 125: 61380 + 495 = 61875
Step 126: 61875 + 495 = 62370
Step 127: 62370 + 495 = 62865
Step 128: 62865 + 495 = 63360
Step 129: 63360 + 495 = 63855
Step 130: 63855 + 495 = 64350
Step 131: 64350 + 495 = 64845
Step 132: 64845 + 495 = 65340
Step 133: 65340 + 495 = 65835
Step 134: 65835 + 495 = 66330
Step 135: 66330 + 495 = 66825
Step 136: 66825 + 495 = 67320
Step 137: 67320 + 495 = 67815
Step 138: 67815 + 495 = 68310
Step 139: 68310 + 495 = 68805
Step 140: 68805 + 495 = 69300
Step 141: 69300 + 495 = 69795
Step 142: 69795 + 495 = 70290
Step 143: 70290 + 495 = 70785
Step 144: 70785 + 495 = 71280
Step 145: 71280 + 495 = 71775
Step 146: 71775 + 495 = 72270
Step 147: 72270 + 495 = 72765
Step 148: 72765 + 495 = 73260
Step 149: 73260 + 495 = 73755
Step 150: 73755 + 495 = 74250
Step 151: 74250 + 495 = 74745
Step 152: 74745 + 495 = 75240
Step 153: 75240 + 495 = 75735
Step 154: 75735 + 495 = 76230
Step 155: 76230 + 495 = 76725
Step 156: 76725 + 495 = 77220
Step 157: 77220 + 495 = 77715
Step 158: 77715 + 495 = 78210
Step 159: 78210 + 495 = 78705
Step 160: 78705 + 495 = 79200
Step 161: 79200 + 495 = 79695
Step 162: 79695 + 495 = 80190
Step 163: 80190 + 495 = 80685
Step 164: 80685 + 495 = 81180
Step 165: 81180 + 495 = 81675
Step 166: 81675 + 495 = 82170
Step 167: 82170 + 495 = 82665
Step 168: 82665 + 495 = 83160
Step 169: 83160 + 495 = 83655
Step 170: 83655 + 495 = 84150
Step 171: 84150 + 495 = 84645
Step 172: 84645 + 495 = 85140
Step 173: 85140 + 495 = 85635
Step 174: 85635 + 495 = 86130
Step 175: 86130 + 495 = 86625
Step 176: 86625 + 495 = 87120
Step 177: 87120 + 495 = 87615
Step 178: 87615 + 495 = 88110
Step 179: 88110 + 495 = 88605
Step 180: 88605 + 495 = 89100
Step 181: 89100 + 495 = 89595
Step 182: 89595 + 495 = 90090
Step 183: 90090 + 495 = 90585
Step 184: 90585 + 495 = 91080
Step 185: 91080 + 495 = 91575
Step 186: 91575 + 495 = 92070
Step 187: 92070 + 495 = 92565
Step 188: 92565 + 495 = 93060
Step 189: 93060 + 495 = 93555
Step 190: 93555 + 495 = 94050
Step 191: 94050 + 495 = 94545
Step 192: 94545 + 495 = 95040
Step 193: 95040 + 495 = 95535
Step 194: 95535 + 495 = 96030
Step 195: 96030 + 495 = 96525
Step 196: 96525 + 495 = 97020
Step 197: 97020 + 495 = 97515
Step 198: 97515 + 495 = 98010
Step 199: 98010 + 495 = 98505
Step 200: 98505 + 495 = 99000
Step 201: 99000 + 495 = 99495
Step 202: 99495 + 495 = 99990
Step 203: 99990 + 495 = 100485
Step 204: 100485 + 495 = 100980
Step 205: 100980 + 495 = 101475
Step 206: 101475 + 495 = 101970
Step 207: 101970 + 495 = 102465
Step 208: 102465 + 495 = 102960
Step 209: 102960 + 495 = 103455
Step 210: 103455 + 495 = 103950
Step 211: 103950 + 495 = 104445
Step 212: 104445 + 495 = 104940
Step 213: 104940 + 495 = 105435
Step 214: 105435 + 495 = 105930
Step 215: 105930 + 495 = 106425
Step 216: 106425 + 495 = 106920
Step 217: 106920 + 495 = 107415
Step 218: 107415 + 495 = 107910
Step 219: 107910 + 495 = 108405
Step 220: 108405 + 495 = 108900
Step 221: 108900 + 495 = 109395
Step 222: 109395 + 495 = 109890
Step 223: 109890 + 495 = 110385
Step 224: 110385 + 495 = 110880
Step 225: 110880 + 495 = 111375
Step 226: 111375 + 495 = 111870
Step 227: 111870 + 495 = 112365
Step 228: 112365 + 495 = 112860
Step 229: 112860 + 495 = 113355
Step 230: 113355 + 495 = 113850
Step 231: 113850 + 495 = 114345
Step 232: 114345 + 495 = 114840
Step 233: 114840 + 495 = 115335
Step 234: 115335 + 495 = 115830
Step 235: 115830 + 495 = 116325
Step 236: 116325 + 495 = 116820
Step 237: 116820 + 495 = 117315
Step 238: 117315 + 495 = 117810
Step 239: 117810 + 495 = 118305
Step 240: 118305 + 495 = 118800
Step 241: 118800 + 495 = 119295
Step 242: 119295 + 495 = 119790
Step 243: 119790 + 495 = 120285
Step 244: 120285 + 495 = 120780
Step 245: 120780 + 495 = 121275
Step 246: 121275 + 495 = 121770
Step 247: 121770 + 495 = 122265
Step 248: 122265 + 495 = 122760
Step 249: 122760 + 495 = 123255
Step 250: 123255 + 495 = 123750
Step 251: 123750 + 495 = 124245
Step 252: 124245 + 495 = 124740
Step 253: 124740 + 495 = 125235
Step 254: 125235 + 495 = 125730
Step 255: 125730 + 495 = 126225
Step 256: 126225 + 495 = 126720
Step 257: 126720 + 495 = 127215
Step 258: 127215 + 495 = 127710
Step 259: 127710 + 495 = 128205
Step 260: 128205 + 495 = 128700
Step 261: 128700 + 495 = 129195
Step 262: 129195 + 495 = 129690
Step 263: 129690 + 495 = 130185
Step 264: 130185 + 495 = 130680
Step 265: 130680 + 495 = 131175
Step 266: 131175 + 495 = 131670
Step 267: 131670 + 495 = 132165
Step 268: 132165 + 495 = 132660
Step 269: 132660 + 495 = 133155
Step 270: 133155 + 495 = 133650
Step 271: 133650 + 495 = 134145
Step 272: 134145 + 495 = 134640
Step 273: 134640 + 495 = 135135
Step 274: 135135 + 495 = 135630
Step 275: 135630 + 495 = 136125
Step 276: 136125 + 495 = 136620
Step 277: 136620 + 495 = 137115
Step 278: 137115 + 495 = 137610
Step 279: 137610 + 495 = 138105
Step 280: 138105 + 495 = 138600
Step 281: 138600 + 495 = 139095
Step 282: 139095 + 495 = 139590
Step 283: 139590 + 495 = 140085
Step 284: 140085 + 495 = 140580
Step 285: 140580 + 495 = 141075
Step 286: 141075 + 495 = 141570
Step 287: 141570 + 495 = 142065
Step 288: 142065 + 495 = 142560
Step 289: 142560 + 495 = 143055
Step 290: 143055 + 495 = 143550
Step 291: 143550 + 495 = 144045
Step 292: 144045 + 495 = 144540
Step 293: 144540 + 495 = 145035
Step 294: 145035 + 495 = 145530
Step 295: 145530 + 495 = 146025
Step 296: 146025 + 495 = 146520
Step 297: 146520 + 495 = 147015
Step 298: 147015 + 495 = 147510
Step 299: 147510 + 495 = 148005
Step 300: 148005 + 495 = 148500
Step 301: 148500 + 495 = 148995
Step 302: 148995 + 495 = 149490
Step 303: 149490 + 495 = 149985
Step 304: 149985 + 495 = 150480
Step 305: 150480 + 495 = 150975
Step 306: 150975 + 495 = 151470
Step 307: 151470 + 495 = 151965
Step 308: 151965 + 495 = 152460
Step 309: 152460 + 495 = 152955
Step 310: 152955 + 495 = 153450
Step 311: 153450 + 495 = 153945
Step 312: 153945 + 495 = 154440
Step 313: 154440 + 495 = 154935
Step 314: 154935 + 495 = 155430
Step 315: 155430 + 495 = 155925
Step 316: 155925 + 495 = 156420
Step 317: 156420 + 495 = 156915
Step 318: 156915 + 495 = 157410
Step 319: 157410 + 495 = 157905
Step 320: 157905 + 495 = 158400
Step 321: 158400 + 495 = 158895
Step 322: 158895 + 495 = 159390
Step 323: 159390 + 495 = 159885
Step 324: 159885 + 495 = 160380
Step 325: 160380 + 495 = 160875
Step 326: 160875 + 495 = 161370
Step 327: 161370 + 495 = 161865
Step 328: 161865 + 495 = 162360
Step 329: 162360 + 495 = 162855
Step 330: 162855 + 495 = 163350
Step 331: 163350 + 495 = 163845
Step 332: 163845 + 495 = 164340
Step 333: 164340 + 495 = 164835
Step 334: 164835 + 495 = 165330
Step 335: 165330 + 495 = 165825
Step 336: 165825 + 495 = 166320
Step 337: 166320 + 495 = 166815
Step 338: 166815 + 495 = 167310
Step 339: 167310 + 495 = 167805
Step 340: 167805 + 495 = 168300
Step 341: 168300 + 495 = 168795
Step 342: 168795 + 495 = 169290
Step 343: 169290 + 495 = 169785
Step 344: 169785 + 495 = 170280
Step 345: 170280 + 495 = 170775
Step 346: 170775 + 495 = 171270
Step 347: 171270 + 495 = 171765
Step 348: 171765 + 495 = 172260
Step 349: 172260 + 495 = 172755
Step 350: 172755 + 495 = 173250
Step 351: 173250 + 495 = 173745
Step 352: 173745 + 495 = 174240
Step 353: 174240 + 495 = 174735
Step 354: 174735 + 495 = 175230
Step 355: 175230 + 495 = 175725
Step 356: 175725 + 495 = 176220
Step 357: 176220 + 495 = 176715
Step 358: 176715 + 495 = 177210
Step 359: 177210 + 495 = 177705
Step 360: 177705 + 495 = 178200
Step 361: 178200 + 495 = 178695
Step 362: 178695 + 495 = 179190
Step 363: 179190 + 495 = 179685
Step 364: 179685 + 495 = 180180
Step 365: 180180 + 495 = 180675
Step 366: 180675 + 495 = 181170
Step 367: 181170 + 495 = 181665
Step 368: 181665 + 495 = 182160
Step 369: 182160 + 495 = 182655
Step 370: 182655 + 495 = 183150
Step 371: 183150 + 495 = 183645
Step 372: 183645 + 495 = 184140
Step 373: 184140 + 495 = 184635
Step 374: 184635 + 495 = 185130
Step 375: 185130 + 495 = 185625
Step 376: 185625 + 495 = 186120
Step 377: 186120 + 495 = 186615
Step 378: 186615 + 495 = 187110
Step 379: 187110 + 495 = 187605
Step 380: 187605 + 495 = 188100
Step 381: 188100 + 495 = 188595
Step 382: 188595 + 495 = 189090
Step 383: 189090 + 495 = 189585
Step 384: 189585 + 495 = 190080
Step 385: 190080 + 495 = 190575
Step 386: 190575 + 495 = 191070
Step 387: 191070 + 495 = 191565
Step 388: 191565 + 495 = 192060
Step 389: 192060 + 495 = 192555
Step 390: 192555 + 495 = 193050
Step 391: 193050 + 495 = 193545
Step 392: 193545 + 495 = 194040
Step 393: 194040 + 495 = 194535
Step 394: 194535 + 495 = 195030
Step 395: 195030 + 495 = 195525
Step 396: 195525 + 495 = 196020
Step 397: 196020 + 495 = 196515
Step 398: 196515 + 495 = 197010
Step 399: 197010 + 495 = 197505
Step 400: 197505 + 495 = 198000
Step 401: 198000 + 495 = 198495
Step 402: 198495 + 495 = 198990
Step 403: 198990 + 495 = 199485
Step 404: 199485 + 495 = 199980
Step 405: 199980 + 495 = 200475
Step 406: 200475 + 495 = 200970
Step 407: 200970 + 495 = 201465
Step 408: 201465 + 495 = 201960
Step 409: 201960 + 495 = 202455
Step 410: 202455 + 495 = 202950
Step 411: 202950 + 495 = 203445
Step 412: 203445 + 495 = 203940
Step 413: 203940 + 495 = 204435
Step 414: 204435 + 495 = 204930
Step 415: 204930 + 495 = 205425
Step 416: 205425 + 495 = 205920
Step 417: 205920 + 495 = 206415
Step 418: 206415 + 495 = 206910
Step 419: 206910 + 495 = 207405
Step 420: 207405 + 495 = 207900

So, 495*420 = 207900