Let's get this math done. We have 47 and we're going to multiply it by 145. This is the same as taking 47 and adding it to itself 145 times.
Step 1: 0 + 47 = 47
Step 2: 47 + 47 = 94
Step 3: 94 + 47 = 141
Step 4: 141 + 47 = 188
Step 5: 188 + 47 = 235
Step 6: 235 + 47 = 282
Step 7: 282 + 47 = 329
Step 8: 329 + 47 = 376
Step 9: 376 + 47 = 423
Step 10: 423 + 47 = 470
Step 11: 470 + 47 = 517
Step 12: 517 + 47 = 564
Step 13: 564 + 47 = 611
Step 14: 611 + 47 = 658
Step 15: 658 + 47 = 705
Step 16: 705 + 47 = 752
Step 17: 752 + 47 = 799
Step 18: 799 + 47 = 846
Step 19: 846 + 47 = 893
Step 20: 893 + 47 = 940
Step 21: 940 + 47 = 987
Step 22: 987 + 47 = 1034
Step 23: 1034 + 47 = 1081
Step 24: 1081 + 47 = 1128
Step 25: 1128 + 47 = 1175
Step 26: 1175 + 47 = 1222
Step 27: 1222 + 47 = 1269
Step 28: 1269 + 47 = 1316
Step 29: 1316 + 47 = 1363
Step 30: 1363 + 47 = 1410
Step 31: 1410 + 47 = 1457
Step 32: 1457 + 47 = 1504
Step 33: 1504 + 47 = 1551
Step 34: 1551 + 47 = 1598
Step 35: 1598 + 47 = 1645
Step 36: 1645 + 47 = 1692
Step 37: 1692 + 47 = 1739
Step 38: 1739 + 47 = 1786
Step 39: 1786 + 47 = 1833
Step 40: 1833 + 47 = 1880
Step 41: 1880 + 47 = 1927
Step 42: 1927 + 47 = 1974
Step 43: 1974 + 47 = 2021
Step 44: 2021 + 47 = 2068
Step 45: 2068 + 47 = 2115
Step 46: 2115 + 47 = 2162
Step 47: 2162 + 47 = 2209
Step 48: 2209 + 47 = 2256
Step 49: 2256 + 47 = 2303
Step 50: 2303 + 47 = 2350
Step 51: 2350 + 47 = 2397
Step 52: 2397 + 47 = 2444
Step 53: 2444 + 47 = 2491
Step 54: 2491 + 47 = 2538
Step 55: 2538 + 47 = 2585
Step 56: 2585 + 47 = 2632
Step 57: 2632 + 47 = 2679
Step 58: 2679 + 47 = 2726
Step 59: 2726 + 47 = 2773
Step 60: 2773 + 47 = 2820
Step 61: 2820 + 47 = 2867
Step 62: 2867 + 47 = 2914
Step 63: 2914 + 47 = 2961
Step 64: 2961 + 47 = 3008
Step 65: 3008 + 47 = 3055
Step 66: 3055 + 47 = 3102
Step 67: 3102 + 47 = 3149
Step 68: 3149 + 47 = 3196
Step 69: 3196 + 47 = 3243
Step 70: 3243 + 47 = 3290
Step 71: 3290 + 47 = 3337
Step 72: 3337 + 47 = 3384
Step 73: 3384 + 47 = 3431
Step 74: 3431 + 47 = 3478
Step 75: 3478 + 47 = 3525
Step 76: 3525 + 47 = 3572
Step 77: 3572 + 47 = 3619
Step 78: 3619 + 47 = 3666
Step 79: 3666 + 47 = 3713
Step 80: 3713 + 47 = 3760
Step 81: 3760 + 47 = 3807
Step 82: 3807 + 47 = 3854
Step 83: 3854 + 47 = 3901
Step 84: 3901 + 47 = 3948
Step 85: 3948 + 47 = 3995
Step 86: 3995 + 47 = 4042
Step 87: 4042 + 47 = 4089
Step 88: 4089 + 47 = 4136
Step 89: 4136 + 47 = 4183
Step 90: 4183 + 47 = 4230
Step 91: 4230 + 47 = 4277
Step 92: 4277 + 47 = 4324
Step 93: 4324 + 47 = 4371
Step 94: 4371 + 47 = 4418
Step 95: 4418 + 47 = 4465
Step 96: 4465 + 47 = 4512
Step 97: 4512 + 47 = 4559
Step 98: 4559 + 47 = 4606
Step 99: 4606 + 47 = 4653
Step 100: 4653 + 47 = 4700
Step 101: 4700 + 47 = 4747
Step 102: 4747 + 47 = 4794
Step 103: 4794 + 47 = 4841
Step 104: 4841 + 47 = 4888
Step 105: 4888 + 47 = 4935
Step 106: 4935 + 47 = 4982
Step 107: 4982 + 47 = 5029
Step 108: 5029 + 47 = 5076
Step 109: 5076 + 47 = 5123
Step 110: 5123 + 47 = 5170
Step 111: 5170 + 47 = 5217
Step 112: 5217 + 47 = 5264
Step 113: 5264 + 47 = 5311
Step 114: 5311 + 47 = 5358
Step 115: 5358 + 47 = 5405
Step 116: 5405 + 47 = 5452
Step 117: 5452 + 47 = 5499
Step 118: 5499 + 47 = 5546
Step 119: 5546 + 47 = 5593
Step 120: 5593 + 47 = 5640
Step 121: 5640 + 47 = 5687
Step 122: 5687 + 47 = 5734
Step 123: 5734 + 47 = 5781
Step 124: 5781 + 47 = 5828
Step 125: 5828 + 47 = 5875
Step 126: 5875 + 47 = 5922
Step 127: 5922 + 47 = 5969
Step 128: 5969 + 47 = 6016
Step 129: 6016 + 47 = 6063
Step 130: 6063 + 47 = 6110
Step 131: 6110 + 47 = 6157
Step 132: 6157 + 47 = 6204
Step 133: 6204 + 47 = 6251
Step 134: 6251 + 47 = 6298
Step 135: 6298 + 47 = 6345
Step 136: 6345 + 47 = 6392
Step 137: 6392 + 47 = 6439
Step 138: 6439 + 47 = 6486
Step 139: 6486 + 47 = 6533
Step 140: 6533 + 47 = 6580
Step 141: 6580 + 47 = 6627
Step 142: 6627 + 47 = 6674
Step 143: 6674 + 47 = 6721
Step 144: 6721 + 47 = 6768
Step 145: 6768 + 47 = 6815

So, 47*145 = 6815