Alright, let's solve this math problem step by step. First, we have the number 878. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 105. So, we're going to take the number 878 and add it to itself 105 times.
Step 1: 0 + 878 = 878
Step 2: 878 + 878 = 1756
Step 3: 1756 + 878 = 2634
Step 4: 2634 + 878 = 3512
Step 5: 3512 + 878 = 4390
Step 6: 4390 + 878 = 5268
Step 7: 5268 + 878 = 6146
Step 8: 6146 + 878 = 7024
Step 9: 7024 + 878 = 7902
Step 10: 7902 + 878 = 8780
Step 11: 8780 + 878 = 9658
Step 12: 9658 + 878 = 10536
Step 13: 10536 + 878 = 11414
Step 14: 11414 + 878 = 12292
Step 15: 12292 + 878 = 13170
Step 16: 13170 + 878 = 14048
Step 17: 14048 + 878 = 14926
Step 18: 14926 + 878 = 15804
Step 19: 15804 + 878 = 16682
Step 20: 16682 + 878 = 17560
Step 21: 17560 + 878 = 18438
Step 22: 18438 + 878 = 19316
Step 23: 19316 + 878 = 20194
Step 24: 20194 + 878 = 21072
Step 25: 21072 + 878 = 21950
Step 26: 21950 + 878 = 22828
Step 27: 22828 + 878 = 23706
Step 28: 23706 + 878 = 24584
Step 29: 24584 + 878 = 25462
Step 30: 25462 + 878 = 26340
Step 31: 26340 + 878 = 27218
Step 32: 27218 + 878 = 28096
Step 33: 28096 + 878 = 28974
Step 34: 28974 + 878 = 29852
Step 35: 29852 + 878 = 30730
Step 36: 30730 + 878 = 31608
Step 37: 31608 + 878 = 32486
Step 38: 32486 + 878 = 33364
Step 39: 33364 + 878 = 34242
Step 40: 34242 + 878 = 35120
Step 41: 35120 + 878 = 35998
Step 42: 35998 + 878 = 36876
Step 43: 36876 + 878 = 37754
Step 44: 37754 + 878 = 38632
Step 45: 38632 + 878 = 39510
Step 46: 39510 + 878 = 40388
Step 47: 40388 + 878 = 41266
Step 48: 41266 + 878 = 42144
Step 49: 42144 + 878 = 43022
Step 50: 43022 + 878 = 43900
Step 51: 43900 + 878 = 44778
Step 52: 44778 + 878 = 45656
Step 53: 45656 + 878 = 46534
Step 54: 46534 + 878 = 47412
Step 55: 47412 + 878 = 48290
Step 56: 48290 + 878 = 49168
Step 57: 49168 + 878 = 50046
Step 58: 50046 + 878 = 50924
Step 59: 50924 + 878 = 51802
Step 60: 51802 + 878 = 52680
Step 61: 52680 + 878 = 53558
Step 62: 53558 + 878 = 54436
Step 63: 54436 + 878 = 55314
Step 64: 55314 + 878 = 56192
Step 65: 56192 + 878 = 57070
Step 66: 57070 + 878 = 57948
Step 67: 57948 + 878 = 58826
Step 68: 58826 + 878 = 59704
Step 69: 59704 + 878 = 60582
Step 70: 60582 + 878 = 61460
Step 71: 61460 + 878 = 62338
Step 72: 62338 + 878 = 63216
Step 73: 63216 + 878 = 64094
Step 74: 64094 + 878 = 64972
Step 75: 64972 + 878 = 65850
Step 76: 65850 + 878 = 66728
Step 77: 66728 + 878 = 67606
Step 78: 67606 + 878 = 68484
Step 79: 68484 + 878 = 69362
Step 80: 69362 + 878 = 70240
Step 81: 70240 + 878 = 71118
Step 82: 71118 + 878 = 71996
Step 83: 71996 + 878 = 72874
Step 84: 72874 + 878 = 73752
Step 85: 73752 + 878 = 74630
Step 86: 74630 + 878 = 75508
Step 87: 75508 + 878 = 76386
Step 88: 76386 + 878 = 77264
Step 89: 77264 + 878 = 78142
Step 90: 78142 + 878 = 79020
Step 91: 79020 + 878 = 79898
Step 92: 79898 + 878 = 80776
Step 93: 80776 + 878 = 81654
Step 94: 81654 + 878 = 82532
Step 95: 82532 + 878 = 83410
Step 96: 83410 + 878 = 84288
Step 97: 84288 + 878 = 85166
Step 98: 85166 + 878 = 86044
Step 99: 86044 + 878 = 86922
Step 100: 86922 + 878 = 87800
Step 101: 87800 + 878 = 88678
Step 102: 88678 + 878 = 89556
Step 103: 89556 + 878 = 90434
Step 104: 90434 + 878 = 91312
Step 105: 91312 + 878 = 92190

So, 878*105 = 92190