Let's get this math done. We have 247 and we're going to multiply it by 345. This is the same as taking 247 and adding it to itself 345 times.
Step 1: 0 + 247 = 247
Step 2: 247 + 247 = 494
Step 3: 494 + 247 = 741
Step 4: 741 + 247 = 988
Step 5: 988 + 247 = 1235
Step 6: 1235 + 247 = 1482
Step 7: 1482 + 247 = 1729
Step 8: 1729 + 247 = 1976
Step 9: 1976 + 247 = 2223
Step 10: 2223 + 247 = 2470
Step 11: 2470 + 247 = 2717
Step 12: 2717 + 247 = 2964
Step 13: 2964 + 247 = 3211
Step 14: 3211 + 247 = 3458
Step 15: 3458 + 247 = 3705
Step 16: 3705 + 247 = 3952
Step 17: 3952 + 247 = 4199
Step 18: 4199 + 247 = 4446
Step 19: 4446 + 247 = 4693
Step 20: 4693 + 247 = 4940
Step 21: 4940 + 247 = 5187
Step 22: 5187 + 247 = 5434
Step 23: 5434 + 247 = 5681
Step 24: 5681 + 247 = 5928
Step 25: 5928 + 247 = 6175
Step 26: 6175 + 247 = 6422
Step 27: 6422 + 247 = 6669
Step 28: 6669 + 247 = 6916
Step 29: 6916 + 247 = 7163
Step 30: 7163 + 247 = 7410
Step 31: 7410 + 247 = 7657
Step 32: 7657 + 247 = 7904
Step 33: 7904 + 247 = 8151
Step 34: 8151 + 247 = 8398
Step 35: 8398 + 247 = 8645
Step 36: 8645 + 247 = 8892
Step 37: 8892 + 247 = 9139
Step 38: 9139 + 247 = 9386
Step 39: 9386 + 247 = 9633
Step 40: 9633 + 247 = 9880
Step 41: 9880 + 247 = 10127
Step 42: 10127 + 247 = 10374
Step 43: 10374 + 247 = 10621
Step 44: 10621 + 247 = 10868
Step 45: 10868 + 247 = 11115
Step 46: 11115 + 247 = 11362
Step 47: 11362 + 247 = 11609
Step 48: 11609 + 247 = 11856
Step 49: 11856 + 247 = 12103
Step 50: 12103 + 247 = 12350
Step 51: 12350 + 247 = 12597
Step 52: 12597 + 247 = 12844
Step 53: 12844 + 247 = 13091
Step 54: 13091 + 247 = 13338
Step 55: 13338 + 247 = 13585
Step 56: 13585 + 247 = 13832
Step 57: 13832 + 247 = 14079
Step 58: 14079 + 247 = 14326
Step 59: 14326 + 247 = 14573
Step 60: 14573 + 247 = 14820
Step 61: 14820 + 247 = 15067
Step 62: 15067 + 247 = 15314
Step 63: 15314 + 247 = 15561
Step 64: 15561 + 247 = 15808
Step 65: 15808 + 247 = 16055
Step 66: 16055 + 247 = 16302
Step 67: 16302 + 247 = 16549
Step 68: 16549 + 247 = 16796
Step 69: 16796 + 247 = 17043
Step 70: 17043 + 247 = 17290
Step 71: 17290 + 247 = 17537
Step 72: 17537 + 247 = 17784
Step 73: 17784 + 247 = 18031
Step 74: 18031 + 247 = 18278
Step 75: 18278 + 247 = 18525
Step 76: 18525 + 247 = 18772
Step 77: 18772 + 247 = 19019
Step 78: 19019 + 247 = 19266
Step 79: 19266 + 247 = 19513
Step 80: 19513 + 247 = 19760
Step 81: 19760 + 247 = 20007
Step 82: 20007 + 247 = 20254
Step 83: 20254 + 247 = 20501
Step 84: 20501 + 247 = 20748
Step 85: 20748 + 247 = 20995
Step 86: 20995 + 247 = 21242
Step 87: 21242 + 247 = 21489
Step 88: 21489 + 247 = 21736
Step 89: 21736 + 247 = 21983
Step 90: 21983 + 247 = 22230
Step 91: 22230 + 247 = 22477
Step 92: 22477 + 247 = 22724
Step 93: 22724 + 247 = 22971
Step 94: 22971 + 247 = 23218
Step 95: 23218 + 247 = 23465
Step 96: 23465 + 247 = 23712
Step 97: 23712 + 247 = 23959
Step 98: 23959 + 247 = 24206
Step 99: 24206 + 247 = 24453
Step 100: 24453 + 247 = 24700
Step 101: 24700 + 247 = 24947
Step 102: 24947 + 247 = 25194
Step 103: 25194 + 247 = 25441
Step 104: 25441 + 247 = 25688
Step 105: 25688 + 247 = 25935
Step 106: 25935 + 247 = 26182
Step 107: 26182 + 247 = 26429
Step 108: 26429 + 247 = 26676
Step 109: 26676 + 247 = 26923
Step 110: 26923 + 247 = 27170
Step 111: 27170 + 247 = 27417
Step 112: 27417 + 247 = 27664
Step 113: 27664 + 247 = 27911
Step 114: 27911 + 247 = 28158
Step 115: 28158 + 247 = 28405
Step 116: 28405 + 247 = 28652
Step 117: 28652 + 247 = 28899
Step 118: 28899 + 247 = 29146
Step 119: 29146 + 247 = 29393
Step 120: 29393 + 247 = 29640
Step 121: 29640 + 247 = 29887
Step 122: 29887 + 247 = 30134
Step 123: 30134 + 247 = 30381
Step 124: 30381 + 247 = 30628
Step 125: 30628 + 247 = 30875
Step 126: 30875 + 247 = 31122
Step 127: 31122 + 247 = 31369
Step 128: 31369 + 247 = 31616
Step 129: 31616 + 247 = 31863
Step 130: 31863 + 247 = 32110
Step 131: 32110 + 247 = 32357
Step 132: 32357 + 247 = 32604
Step 133: 32604 + 247 = 32851
Step 134: 32851 + 247 = 33098
Step 135: 33098 + 247 = 33345
Step 136: 33345 + 247 = 33592
Step 137: 33592 + 247 = 33839
Step 138: 33839 + 247 = 34086
Step 139: 34086 + 247 = 34333
Step 140: 34333 + 247 = 34580
Step 141: 34580 + 247 = 34827
Step 142: 34827 + 247 = 35074
Step 143: 35074 + 247 = 35321
Step 144: 35321 + 247 = 35568
Step 145: 35568 + 247 = 35815
Step 146: 35815 + 247 = 36062
Step 147: 36062 + 247 = 36309
Step 148: 36309 + 247 = 36556
Step 149: 36556 + 247 = 36803
Step 150: 36803 + 247 = 37050
Step 151: 37050 + 247 = 37297
Step 152: 37297 + 247 = 37544
Step 153: 37544 + 247 = 37791
Step 154: 37791 + 247 = 38038
Step 155: 38038 + 247 = 38285
Step 156: 38285 + 247 = 38532
Step 157: 38532 + 247 = 38779
Step 158: 38779 + 247 = 39026
Step 159: 39026 + 247 = 39273
Step 160: 39273 + 247 = 39520
Step 161: 39520 + 247 = 39767
Step 162: 39767 + 247 = 40014
Step 163: 40014 + 247 = 40261
Step 164: 40261 + 247 = 40508
Step 165: 40508 + 247 = 40755
Step 166: 40755 + 247 = 41002
Step 167: 41002 + 247 = 41249
Step 168: 41249 + 247 = 41496
Step 169: 41496 + 247 = 41743
Step 170: 41743 + 247 = 41990
Step 171: 41990 + 247 = 42237
Step 172: 42237 + 247 = 42484
Step 173: 42484 + 247 = 42731
Step 174: 42731 + 247 = 42978
Step 175: 42978 + 247 = 43225
Step 176: 43225 + 247 = 43472
Step 177: 43472 + 247 = 43719
Step 178: 43719 + 247 = 43966
Step 179: 43966 + 247 = 44213
Step 180: 44213 + 247 = 44460
Step 181: 44460 + 247 = 44707
Step 182: 44707 + 247 = 44954
Step 183: 44954 + 247 = 45201
Step 184: 45201 + 247 = 45448
Step 185: 45448 + 247 = 45695
Step 186: 45695 + 247 = 45942
Step 187: 45942 + 247 = 46189
Step 188: 46189 + 247 = 46436
Step 189: 46436 + 247 = 46683
Step 190: 46683 + 247 = 46930
Step 191: 46930 + 247 = 47177
Step 192: 47177 + 247 = 47424
Step 193: 47424 + 247 = 47671
Step 194: 47671 + 247 = 47918
Step 195: 47918 + 247 = 48165
Step 196: 48165 + 247 = 48412
Step 197: 48412 + 247 = 48659
Step 198: 48659 + 247 = 48906
Step 199: 48906 + 247 = 49153
Step 200: 49153 + 247 = 49400
Step 201: 49400 + 247 = 49647
Step 202: 49647 + 247 = 49894
Step 203: 49894 + 247 = 50141
Step 204: 50141 + 247 = 50388
Step 205: 50388 + 247 = 50635
Step 206: 50635 + 247 = 50882
Step 207: 50882 + 247 = 51129
Step 208: 51129 + 247 = 51376
Step 209: 51376 + 247 = 51623
Step 210: 51623 + 247 = 51870
Step 211: 51870 + 247 = 52117
Step 212: 52117 + 247 = 52364
Step 213: 52364 + 247 = 52611
Step 214: 52611 + 247 = 52858
Step 215: 52858 + 247 = 53105
Step 216: 53105 + 247 = 53352
Step 217: 53352 + 247 = 53599
Step 218: 53599 + 247 = 53846
Step 219: 53846 + 247 = 54093
Step 220: 54093 + 247 = 54340
Step 221: 54340 + 247 = 54587
Step 222: 54587 + 247 = 54834
Step 223: 54834 + 247 = 55081
Step 224: 55081 + 247 = 55328
Step 225: 55328 + 247 = 55575
Step 226: 55575 + 247 = 55822
Step 227: 55822 + 247 = 56069
Step 228: 56069 + 247 = 56316
Step 229: 56316 + 247 = 56563
Step 230: 56563 + 247 = 56810
Step 231: 56810 + 247 = 57057
Step 232: 57057 + 247 = 57304
Step 233: 57304 + 247 = 57551
Step 234: 57551 + 247 = 57798
Step 235: 57798 + 247 = 58045
Step 236: 58045 + 247 = 58292
Step 237: 58292 + 247 = 58539
Step 238: 58539 + 247 = 58786
Step 239: 58786 + 247 = 59033
Step 240: 59033 + 247 = 59280
Step 241: 59280 + 247 = 59527
Step 242: 59527 + 247 = 59774
Step 243: 59774 + 247 = 60021
Step 244: 60021 + 247 = 60268
Step 245: 60268 + 247 = 60515
Step 246: 60515 + 247 = 60762
Step 247: 60762 + 247 = 61009
Step 248: 61009 + 247 = 61256
Step 249: 61256 + 247 = 61503
Step 250: 61503 + 247 = 61750
Step 251: 61750 + 247 = 61997
Step 252: 61997 + 247 = 62244
Step 253: 62244 + 247 = 62491
Step 254: 62491 + 247 = 62738
Step 255: 62738 + 247 = 62985
Step 256: 62985 + 247 = 63232
Step 257: 63232 + 247 = 63479
Step 258: 63479 + 247 = 63726
Step 259: 63726 + 247 = 63973
Step 260: 63973 + 247 = 64220
Step 261: 64220 + 247 = 64467
Step 262: 64467 + 247 = 64714
Step 263: 64714 + 247 = 64961
Step 264: 64961 + 247 = 65208
Step 265: 65208 + 247 = 65455
Step 266: 65455 + 247 = 65702
Step 267: 65702 + 247 = 65949
Step 268: 65949 + 247 = 66196
Step 269: 66196 + 247 = 66443
Step 270: 66443 + 247 = 66690
Step 271: 66690 + 247 = 66937
Step 272: 66937 + 247 = 67184
Step 273: 67184 + 247 = 67431
Step 274: 67431 + 247 = 67678
Step 275: 67678 + 247 = 67925
Step 276: 67925 + 247 = 68172
Step 277: 68172 + 247 = 68419
Step 278: 68419 + 247 = 68666
Step 279: 68666 + 247 = 68913
Step 280: 68913 + 247 = 69160
Step 281: 69160 + 247 = 69407
Step 282: 69407 + 247 = 69654
Step 283: 69654 + 247 = 69901
Step 284: 69901 + 247 = 70148
Step 285: 70148 + 247 = 70395
Step 286: 70395 + 247 = 70642
Step 287: 70642 + 247 = 70889
Step 288: 70889 + 247 = 71136
Step 289: 71136 + 247 = 71383
Step 290: 71383 + 247 = 71630
Step 291: 71630 + 247 = 71877
Step 292: 71877 + 247 = 72124
Step 293: 72124 + 247 = 72371
Step 294: 72371 + 247 = 72618
Step 295: 72618 + 247 = 72865
Step 296: 72865 + 247 = 73112
Step 297: 73112 + 247 = 73359
Step 298: 73359 + 247 = 73606
Step 299: 73606 + 247 = 73853
Step 300: 73853 + 247 = 74100
Step 301: 74100 + 247 = 74347
Step 302: 74347 + 247 = 74594
Step 303: 74594 + 247 = 74841
Step 304: 74841 + 247 = 75088
Step 305: 75088 + 247 = 75335
Step 306: 75335 + 247 = 75582
Step 307: 75582 + 247 = 75829
Step 308: 75829 + 247 = 76076
Step 309: 76076 + 247 = 76323
Step 310: 76323 + 247 = 76570
Step 311: 76570 + 247 = 76817
Step 312: 76817 + 247 = 77064
Step 313: 77064 + 247 = 77311
Step 314: 77311 + 247 = 77558
Step 315: 77558 + 247 = 77805
Step 316: 77805 + 247 = 78052
Step 317: 78052 + 247 = 78299
Step 318: 78299 + 247 = 78546
Step 319: 78546 + 247 = 78793
Step 320: 78793 + 247 = 79040
Step 321: 79040 + 247 = 79287
Step 322: 79287 + 247 = 79534
Step 323: 79534 + 247 = 79781
Step 324: 79781 + 247 = 80028
Step 325: 80028 + 247 = 80275
Step 326: 80275 + 247 = 80522
Step 327: 80522 + 247 = 80769
Step 328: 80769 + 247 = 81016
Step 329: 81016 + 247 = 81263
Step 330: 81263 + 247 = 81510
Step 331: 81510 + 247 = 81757
Step 332: 81757 + 247 = 82004
Step 333: 82004 + 247 = 82251
Step 334: 82251 + 247 = 82498
Step 335: 82498 + 247 = 82745
Step 336: 82745 + 247 = 82992
Step 337: 82992 + 247 = 83239
Step 338: 83239 + 247 = 83486
Step 339: 83486 + 247 = 83733
Step 340: 83733 + 247 = 83980
Step 341: 83980 + 247 = 84227
Step 342: 84227 + 247 = 84474
Step 343: 84474 + 247 = 84721
Step 344: 84721 + 247 = 84968
Step 345: 84968 + 247 = 85215

So, 247*345 = 85215