OK, let's work through this together. We're starting with 882 and we're going to multiply it by 102, which means we add 882 to itself 102 times.
Step 1: 0 + 882 = 882
Step 2: 882 + 882 = 1764
Step 3: 1764 + 882 = 2646
Step 4: 2646 + 882 = 3528
Step 5: 3528 + 882 = 4410
Step 6: 4410 + 882 = 5292
Step 7: 5292 + 882 = 6174
Step 8: 6174 + 882 = 7056
Step 9: 7056 + 882 = 7938
Step 10: 7938 + 882 = 8820
Step 11: 8820 + 882 = 9702
Step 12: 9702 + 882 = 10584
Step 13: 10584 + 882 = 11466
Step 14: 11466 + 882 = 12348
Step 15: 12348 + 882 = 13230
Step 16: 13230 + 882 = 14112
Step 17: 14112 + 882 = 14994
Step 18: 14994 + 882 = 15876
Step 19: 15876 + 882 = 16758
Step 20: 16758 + 882 = 17640
Step 21: 17640 + 882 = 18522
Step 22: 18522 + 882 = 19404
Step 23: 19404 + 882 = 20286
Step 24: 20286 + 882 = 21168
Step 25: 21168 + 882 = 22050
Step 26: 22050 + 882 = 22932
Step 27: 22932 + 882 = 23814
Step 28: 23814 + 882 = 24696
Step 29: 24696 + 882 = 25578
Step 30: 25578 + 882 = 26460
Step 31: 26460 + 882 = 27342
Step 32: 27342 + 882 = 28224
Step 33: 28224 + 882 = 29106
Step 34: 29106 + 882 = 29988
Step 35: 29988 + 882 = 30870
Step 36: 30870 + 882 = 31752
Step 37: 31752 + 882 = 32634
Step 38: 32634 + 882 = 33516
Step 39: 33516 + 882 = 34398
Step 40: 34398 + 882 = 35280
Step 41: 35280 + 882 = 36162
Step 42: 36162 + 882 = 37044
Step 43: 37044 + 882 = 37926
Step 44: 37926 + 882 = 38808
Step 45: 38808 + 882 = 39690
Step 46: 39690 + 882 = 40572
Step 47: 40572 + 882 = 41454
Step 48: 41454 + 882 = 42336
Step 49: 42336 + 882 = 43218
Step 50: 43218 + 882 = 44100
Step 51: 44100 + 882 = 44982
Step 52: 44982 + 882 = 45864
Step 53: 45864 + 882 = 46746
Step 54: 46746 + 882 = 47628
Step 55: 47628 + 882 = 48510
Step 56: 48510 + 882 = 49392
Step 57: 49392 + 882 = 50274
Step 58: 50274 + 882 = 51156
Step 59: 51156 + 882 = 52038
Step 60: 52038 + 882 = 52920
Step 61: 52920 + 882 = 53802
Step 62: 53802 + 882 = 54684
Step 63: 54684 + 882 = 55566
Step 64: 55566 + 882 = 56448
Step 65: 56448 + 882 = 57330
Step 66: 57330 + 882 = 58212
Step 67: 58212 + 882 = 59094
Step 68: 59094 + 882 = 59976
Step 69: 59976 + 882 = 60858
Step 70: 60858 + 882 = 61740
Step 71: 61740 + 882 = 62622
Step 72: 62622 + 882 = 63504
Step 73: 63504 + 882 = 64386
Step 74: 64386 + 882 = 65268
Step 75: 65268 + 882 = 66150
Step 76: 66150 + 882 = 67032
Step 77: 67032 + 882 = 67914
Step 78: 67914 + 882 = 68796
Step 79: 68796 + 882 = 69678
Step 80: 69678 + 882 = 70560
Step 81: 70560 + 882 = 71442
Step 82: 71442 + 882 = 72324
Step 83: 72324 + 882 = 73206
Step 84: 73206 + 882 = 74088
Step 85: 74088 + 882 = 74970
Step 86: 74970 + 882 = 75852
Step 87: 75852 + 882 = 76734
Step 88: 76734 + 882 = 77616
Step 89: 77616 + 882 = 78498
Step 90: 78498 + 882 = 79380
Step 91: 79380 + 882 = 80262
Step 92: 80262 + 882 = 81144
Step 93: 81144 + 882 = 82026
Step 94: 82026 + 882 = 82908
Step 95: 82908 + 882 = 83790
Step 96: 83790 + 882 = 84672
Step 97: 84672 + 882 = 85554
Step 98: 85554 + 882 = 86436
Step 99: 86436 + 882 = 87318
Step 100: 87318 + 882 = 88200
Step 101: 88200 + 882 = 89082
Step 102: 89082 + 882 = 89964

So, 882*102 = 89964