OK, let's work through this together. We're starting with 518 and we're going to multiply it by 102, which means we add 518 to itself 102 times.
Step 1: 0 + 518 = 518
Step 2: 518 + 518 = 1036
Step 3: 1036 + 518 = 1554
Step 4: 1554 + 518 = 2072
Step 5: 2072 + 518 = 2590
Step 6: 2590 + 518 = 3108
Step 7: 3108 + 518 = 3626
Step 8: 3626 + 518 = 4144
Step 9: 4144 + 518 = 4662
Step 10: 4662 + 518 = 5180
Step 11: 5180 + 518 = 5698
Step 12: 5698 + 518 = 6216
Step 13: 6216 + 518 = 6734
Step 14: 6734 + 518 = 7252
Step 15: 7252 + 518 = 7770
Step 16: 7770 + 518 = 8288
Step 17: 8288 + 518 = 8806
Step 18: 8806 + 518 = 9324
Step 19: 9324 + 518 = 9842
Step 20: 9842 + 518 = 10360
Step 21: 10360 + 518 = 10878
Step 22: 10878 + 518 = 11396
Step 23: 11396 + 518 = 11914
Step 24: 11914 + 518 = 12432
Step 25: 12432 + 518 = 12950
Step 26: 12950 + 518 = 13468
Step 27: 13468 + 518 = 13986
Step 28: 13986 + 518 = 14504
Step 29: 14504 + 518 = 15022
Step 30: 15022 + 518 = 15540
Step 31: 15540 + 518 = 16058
Step 32: 16058 + 518 = 16576
Step 33: 16576 + 518 = 17094
Step 34: 17094 + 518 = 17612
Step 35: 17612 + 518 = 18130
Step 36: 18130 + 518 = 18648
Step 37: 18648 + 518 = 19166
Step 38: 19166 + 518 = 19684
Step 39: 19684 + 518 = 20202
Step 40: 20202 + 518 = 20720
Step 41: 20720 + 518 = 21238
Step 42: 21238 + 518 = 21756
Step 43: 21756 + 518 = 22274
Step 44: 22274 + 518 = 22792
Step 45: 22792 + 518 = 23310
Step 46: 23310 + 518 = 23828
Step 47: 23828 + 518 = 24346
Step 48: 24346 + 518 = 24864
Step 49: 24864 + 518 = 25382
Step 50: 25382 + 518 = 25900
Step 51: 25900 + 518 = 26418
Step 52: 26418 + 518 = 26936
Step 53: 26936 + 518 = 27454
Step 54: 27454 + 518 = 27972
Step 55: 27972 + 518 = 28490
Step 56: 28490 + 518 = 29008
Step 57: 29008 + 518 = 29526
Step 58: 29526 + 518 = 30044
Step 59: 30044 + 518 = 30562
Step 60: 30562 + 518 = 31080
Step 61: 31080 + 518 = 31598
Step 62: 31598 + 518 = 32116
Step 63: 32116 + 518 = 32634
Step 64: 32634 + 518 = 33152
Step 65: 33152 + 518 = 33670
Step 66: 33670 + 518 = 34188
Step 67: 34188 + 518 = 34706
Step 68: 34706 + 518 = 35224
Step 69: 35224 + 518 = 35742
Step 70: 35742 + 518 = 36260
Step 71: 36260 + 518 = 36778
Step 72: 36778 + 518 = 37296
Step 73: 37296 + 518 = 37814
Step 74: 37814 + 518 = 38332
Step 75: 38332 + 518 = 38850
Step 76: 38850 + 518 = 39368
Step 77: 39368 + 518 = 39886
Step 78: 39886 + 518 = 40404
Step 79: 40404 + 518 = 40922
Step 80: 40922 + 518 = 41440
Step 81: 41440 + 518 = 41958
Step 82: 41958 + 518 = 42476
Step 83: 42476 + 518 = 42994
Step 84: 42994 + 518 = 43512
Step 85: 43512 + 518 = 44030
Step 86: 44030 + 518 = 44548
Step 87: 44548 + 518 = 45066
Step 88: 45066 + 518 = 45584
Step 89: 45584 + 518 = 46102
Step 90: 46102 + 518 = 46620
Step 91: 46620 + 518 = 47138
Step 92: 47138 + 518 = 47656
Step 93: 47656 + 518 = 48174
Step 94: 48174 + 518 = 48692
Step 95: 48692 + 518 = 49210
Step 96: 49210 + 518 = 49728
Step 97: 49728 + 518 = 50246
Step 98: 50246 + 518 = 50764
Step 99: 50764 + 518 = 51282
Step 100: 51282 + 518 = 51800
Step 101: 51800 + 518 = 52318
Step 102: 52318 + 518 = 52836

So, 518*102 = 52836