Sure thing, let's get straight to it. We start with 902 and we're going to multiply it by 103, which means adding 902 to itself 103 times.
Step 1: 0 + 902 = 902
Step 2: 902 + 902 = 1804
Step 3: 1804 + 902 = 2706
Step 4: 2706 + 902 = 3608
Step 5: 3608 + 902 = 4510
Step 6: 4510 + 902 = 5412
Step 7: 5412 + 902 = 6314
Step 8: 6314 + 902 = 7216
Step 9: 7216 + 902 = 8118
Step 10: 8118 + 902 = 9020
Step 11: 9020 + 902 = 9922
Step 12: 9922 + 902 = 10824
Step 13: 10824 + 902 = 11726
Step 14: 11726 + 902 = 12628
Step 15: 12628 + 902 = 13530
Step 16: 13530 + 902 = 14432
Step 17: 14432 + 902 = 15334
Step 18: 15334 + 902 = 16236
Step 19: 16236 + 902 = 17138
Step 20: 17138 + 902 = 18040
Step 21: 18040 + 902 = 18942
Step 22: 18942 + 902 = 19844
Step 23: 19844 + 902 = 20746
Step 24: 20746 + 902 = 21648
Step 25: 21648 + 902 = 22550
Step 26: 22550 + 902 = 23452
Step 27: 23452 + 902 = 24354
Step 28: 24354 + 902 = 25256
Step 29: 25256 + 902 = 26158
Step 30: 26158 + 902 = 27060
Step 31: 27060 + 902 = 27962
Step 32: 27962 + 902 = 28864
Step 33: 28864 + 902 = 29766
Step 34: 29766 + 902 = 30668
Step 35: 30668 + 902 = 31570
Step 36: 31570 + 902 = 32472
Step 37: 32472 + 902 = 33374
Step 38: 33374 + 902 = 34276
Step 39: 34276 + 902 = 35178
Step 40: 35178 + 902 = 36080
Step 41: 36080 + 902 = 36982
Step 42: 36982 + 902 = 37884
Step 43: 37884 + 902 = 38786
Step 44: 38786 + 902 = 39688
Step 45: 39688 + 902 = 40590
Step 46: 40590 + 902 = 41492
Step 47: 41492 + 902 = 42394
Step 48: 42394 + 902 = 43296
Step 49: 43296 + 902 = 44198
Step 50: 44198 + 902 = 45100
Step 51: 45100 + 902 = 46002
Step 52: 46002 + 902 = 46904
Step 53: 46904 + 902 = 47806
Step 54: 47806 + 902 = 48708
Step 55: 48708 + 902 = 49610
Step 56: 49610 + 902 = 50512
Step 57: 50512 + 902 = 51414
Step 58: 51414 + 902 = 52316
Step 59: 52316 + 902 = 53218
Step 60: 53218 + 902 = 54120
Step 61: 54120 + 902 = 55022
Step 62: 55022 + 902 = 55924
Step 63: 55924 + 902 = 56826
Step 64: 56826 + 902 = 57728
Step 65: 57728 + 902 = 58630
Step 66: 58630 + 902 = 59532
Step 67: 59532 + 902 = 60434
Step 68: 60434 + 902 = 61336
Step 69: 61336 + 902 = 62238
Step 70: 62238 + 902 = 63140
Step 71: 63140 + 902 = 64042
Step 72: 64042 + 902 = 64944
Step 73: 64944 + 902 = 65846
Step 74: 65846 + 902 = 66748
Step 75: 66748 + 902 = 67650
Step 76: 67650 + 902 = 68552
Step 77: 68552 + 902 = 69454
Step 78: 69454 + 902 = 70356
Step 79: 70356 + 902 = 71258
Step 80: 71258 + 902 = 72160
Step 81: 72160 + 902 = 73062
Step 82: 73062 + 902 = 73964
Step 83: 73964 + 902 = 74866
Step 84: 74866 + 902 = 75768
Step 85: 75768 + 902 = 76670
Step 86: 76670 + 902 = 77572
Step 87: 77572 + 902 = 78474
Step 88: 78474 + 902 = 79376
Step 89: 79376 + 902 = 80278
Step 90: 80278 + 902 = 81180
Step 91: 81180 + 902 = 82082
Step 92: 82082 + 902 = 82984
Step 93: 82984 + 902 = 83886
Step 94: 83886 + 902 = 84788
Step 95: 84788 + 902 = 85690
Step 96: 85690 + 902 = 86592
Step 97: 86592 + 902 = 87494
Step 98: 87494 + 902 = 88396
Step 99: 88396 + 902 = 89298
Step 100: 89298 + 902 = 90200
Step 101: 90200 + 902 = 91102
Step 102: 91102 + 902 = 92004
Step 103: 92004 + 902 = 92906

So, 902*103 = 92906