Alright, let's solve this math problem step by step. First, we have the number 782. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 155. So, we're going to take the number 782 and add it to itself 155 times.
Step 1: 0 + 782 = 782
Step 2: 782 + 782 = 1564
Step 3: 1564 + 782 = 2346
Step 4: 2346 + 782 = 3128
Step 5: 3128 + 782 = 3910
Step 6: 3910 + 782 = 4692
Step 7: 4692 + 782 = 5474
Step 8: 5474 + 782 = 6256
Step 9: 6256 + 782 = 7038
Step 10: 7038 + 782 = 7820
Step 11: 7820 + 782 = 8602
Step 12: 8602 + 782 = 9384
Step 13: 9384 + 782 = 10166
Step 14: 10166 + 782 = 10948
Step 15: 10948 + 782 = 11730
Step 16: 11730 + 782 = 12512
Step 17: 12512 + 782 = 13294
Step 18: 13294 + 782 = 14076
Step 19: 14076 + 782 = 14858
Step 20: 14858 + 782 = 15640
Step 21: 15640 + 782 = 16422
Step 22: 16422 + 782 = 17204
Step 23: 17204 + 782 = 17986
Step 24: 17986 + 782 = 18768
Step 25: 18768 + 782 = 19550
Step 26: 19550 + 782 = 20332
Step 27: 20332 + 782 = 21114
Step 28: 21114 + 782 = 21896
Step 29: 21896 + 782 = 22678
Step 30: 22678 + 782 = 23460
Step 31: 23460 + 782 = 24242
Step 32: 24242 + 782 = 25024
Step 33: 25024 + 782 = 25806
Step 34: 25806 + 782 = 26588
Step 35: 26588 + 782 = 27370
Step 36: 27370 + 782 = 28152
Step 37: 28152 + 782 = 28934
Step 38: 28934 + 782 = 29716
Step 39: 29716 + 782 = 30498
Step 40: 30498 + 782 = 31280
Step 41: 31280 + 782 = 32062
Step 42: 32062 + 782 = 32844
Step 43: 32844 + 782 = 33626
Step 44: 33626 + 782 = 34408
Step 45: 34408 + 782 = 35190
Step 46: 35190 + 782 = 35972
Step 47: 35972 + 782 = 36754
Step 48: 36754 + 782 = 37536
Step 49: 37536 + 782 = 38318
Step 50: 38318 + 782 = 39100
Step 51: 39100 + 782 = 39882
Step 52: 39882 + 782 = 40664
Step 53: 40664 + 782 = 41446
Step 54: 41446 + 782 = 42228
Step 55: 42228 + 782 = 43010
Step 56: 43010 + 782 = 43792
Step 57: 43792 + 782 = 44574
Step 58: 44574 + 782 = 45356
Step 59: 45356 + 782 = 46138
Step 60: 46138 + 782 = 46920
Step 61: 46920 + 782 = 47702
Step 62: 47702 + 782 = 48484
Step 63: 48484 + 782 = 49266
Step 64: 49266 + 782 = 50048
Step 65: 50048 + 782 = 50830
Step 66: 50830 + 782 = 51612
Step 67: 51612 + 782 = 52394
Step 68: 52394 + 782 = 53176
Step 69: 53176 + 782 = 53958
Step 70: 53958 + 782 = 54740
Step 71: 54740 + 782 = 55522
Step 72: 55522 + 782 = 56304
Step 73: 56304 + 782 = 57086
Step 74: 57086 + 782 = 57868
Step 75: 57868 + 782 = 58650
Step 76: 58650 + 782 = 59432
Step 77: 59432 + 782 = 60214
Step 78: 60214 + 782 = 60996
Step 79: 60996 + 782 = 61778
Step 80: 61778 + 782 = 62560
Step 81: 62560 + 782 = 63342
Step 82: 63342 + 782 = 64124
Step 83: 64124 + 782 = 64906
Step 84: 64906 + 782 = 65688
Step 85: 65688 + 782 = 66470
Step 86: 66470 + 782 = 67252
Step 87: 67252 + 782 = 68034
Step 88: 68034 + 782 = 68816
Step 89: 68816 + 782 = 69598
Step 90: 69598 + 782 = 70380
Step 91: 70380 + 782 = 71162
Step 92: 71162 + 782 = 71944
Step 93: 71944 + 782 = 72726
Step 94: 72726 + 782 = 73508
Step 95: 73508 + 782 = 74290
Step 96: 74290 + 782 = 75072
Step 97: 75072 + 782 = 75854
Step 98: 75854 + 782 = 76636
Step 99: 76636 + 782 = 77418
Step 100: 77418 + 782 = 78200
Step 101: 78200 + 782 = 78982
Step 102: 78982 + 782 = 79764
Step 103: 79764 + 782 = 80546
Step 104: 80546 + 782 = 81328
Step 105: 81328 + 782 = 82110
Step 106: 82110 + 782 = 82892
Step 107: 82892 + 782 = 83674
Step 108: 83674 + 782 = 84456
Step 109: 84456 + 782 = 85238
Step 110: 85238 + 782 = 86020
Step 111: 86020 + 782 = 86802
Step 112: 86802 + 782 = 87584
Step 113: 87584 + 782 = 88366
Step 114: 88366 + 782 = 89148
Step 115: 89148 + 782 = 89930
Step 116: 89930 + 782 = 90712
Step 117: 90712 + 782 = 91494
Step 118: 91494 + 782 = 92276
Step 119: 92276 + 782 = 93058
Step 120: 93058 + 782 = 93840
Step 121: 93840 + 782 = 94622
Step 122: 94622 + 782 = 95404
Step 123: 95404 + 782 = 96186
Step 124: 96186 + 782 = 96968
Step 125: 96968 + 782 = 97750
Step 126: 97750 + 782 = 98532
Step 127: 98532 + 782 = 99314
Step 128: 99314 + 782 = 100096
Step 129: 100096 + 782 = 100878
Step 130: 100878 + 782 = 101660
Step 131: 101660 + 782 = 102442
Step 132: 102442 + 782 = 103224
Step 133: 103224 + 782 = 104006
Step 134: 104006 + 782 = 104788
Step 135: 104788 + 782 = 105570
Step 136: 105570 + 782 = 106352
Step 137: 106352 + 782 = 107134
Step 138: 107134 + 782 = 107916
Step 139: 107916 + 782 = 108698
Step 140: 108698 + 782 = 109480
Step 141: 109480 + 782 = 110262
Step 142: 110262 + 782 = 111044
Step 143: 111044 + 782 = 111826
Step 144: 111826 + 782 = 112608
Step 145: 112608 + 782 = 113390
Step 146: 113390 + 782 = 114172
Step 147: 114172 + 782 = 114954
Step 148: 114954 + 782 = 115736
Step 149: 115736 + 782 = 116518
Step 150: 116518 + 782 = 117300
Step 151: 117300 + 782 = 118082
Step 152: 118082 + 782 = 118864
Step 153: 118864 + 782 = 119646
Step 154: 119646 + 782 = 120428
Step 155: 120428 + 782 = 121210

So, 782*155 = 121210