OK, let's work through this together. We're starting with 988 and we're going to multiply it by 103, which means we add 988 to itself 103 times.
Step 1: 0 + 988 = 988
Step 2: 988 + 988 = 1976
Step 3: 1976 + 988 = 2964
Step 4: 2964 + 988 = 3952
Step 5: 3952 + 988 = 4940
Step 6: 4940 + 988 = 5928
Step 7: 5928 + 988 = 6916
Step 8: 6916 + 988 = 7904
Step 9: 7904 + 988 = 8892
Step 10: 8892 + 988 = 9880
Step 11: 9880 + 988 = 10868
Step 12: 10868 + 988 = 11856
Step 13: 11856 + 988 = 12844
Step 14: 12844 + 988 = 13832
Step 15: 13832 + 988 = 14820
Step 16: 14820 + 988 = 15808
Step 17: 15808 + 988 = 16796
Step 18: 16796 + 988 = 17784
Step 19: 17784 + 988 = 18772
Step 20: 18772 + 988 = 19760
Step 21: 19760 + 988 = 20748
Step 22: 20748 + 988 = 21736
Step 23: 21736 + 988 = 22724
Step 24: 22724 + 988 = 23712
Step 25: 23712 + 988 = 24700
Step 26: 24700 + 988 = 25688
Step 27: 25688 + 988 = 26676
Step 28: 26676 + 988 = 27664
Step 29: 27664 + 988 = 28652
Step 30: 28652 + 988 = 29640
Step 31: 29640 + 988 = 30628
Step 32: 30628 + 988 = 31616
Step 33: 31616 + 988 = 32604
Step 34: 32604 + 988 = 33592
Step 35: 33592 + 988 = 34580
Step 36: 34580 + 988 = 35568
Step 37: 35568 + 988 = 36556
Step 38: 36556 + 988 = 37544
Step 39: 37544 + 988 = 38532
Step 40: 38532 + 988 = 39520
Step 41: 39520 + 988 = 40508
Step 42: 40508 + 988 = 41496
Step 43: 41496 + 988 = 42484
Step 44: 42484 + 988 = 43472
Step 45: 43472 + 988 = 44460
Step 46: 44460 + 988 = 45448
Step 47: 45448 + 988 = 46436
Step 48: 46436 + 988 = 47424
Step 49: 47424 + 988 = 48412
Step 50: 48412 + 988 = 49400
Step 51: 49400 + 988 = 50388
Step 52: 50388 + 988 = 51376
Step 53: 51376 + 988 = 52364
Step 54: 52364 + 988 = 53352
Step 55: 53352 + 988 = 54340
Step 56: 54340 + 988 = 55328
Step 57: 55328 + 988 = 56316
Step 58: 56316 + 988 = 57304
Step 59: 57304 + 988 = 58292
Step 60: 58292 + 988 = 59280
Step 61: 59280 + 988 = 60268
Step 62: 60268 + 988 = 61256
Step 63: 61256 + 988 = 62244
Step 64: 62244 + 988 = 63232
Step 65: 63232 + 988 = 64220
Step 66: 64220 + 988 = 65208
Step 67: 65208 + 988 = 66196
Step 68: 66196 + 988 = 67184
Step 69: 67184 + 988 = 68172
Step 70: 68172 + 988 = 69160
Step 71: 69160 + 988 = 70148
Step 72: 70148 + 988 = 71136
Step 73: 71136 + 988 = 72124
Step 74: 72124 + 988 = 73112
Step 75: 73112 + 988 = 74100
Step 76: 74100 + 988 = 75088
Step 77: 75088 + 988 = 76076
Step 78: 76076 + 988 = 77064
Step 79: 77064 + 988 = 78052
Step 80: 78052 + 988 = 79040
Step 81: 79040 + 988 = 80028
Step 82: 80028 + 988 = 81016
Step 83: 81016 + 988 = 82004
Step 84: 82004 + 988 = 82992
Step 85: 82992 + 988 = 83980
Step 86: 83980 + 988 = 84968
Step 87: 84968 + 988 = 85956
Step 88: 85956 + 988 = 86944
Step 89: 86944 + 988 = 87932
Step 90: 87932 + 988 = 88920
Step 91: 88920 + 988 = 89908
Step 92: 89908 + 988 = 90896
Step 93: 90896 + 988 = 91884
Step 94: 91884 + 988 = 92872
Step 95: 92872 + 988 = 93860
Step 96: 93860 + 988 = 94848
Step 97: 94848 + 988 = 95836
Step 98: 95836 + 988 = 96824
Step 99: 96824 + 988 = 97812
Step 100: 97812 + 988 = 98800
Step 101: 98800 + 988 = 99788
Step 102: 99788 + 988 = 100776
Step 103: 100776 + 988 = 101764

So, 988*103 = 101764