Sure thing, let's get straight to it. We start with 797 and we're going to multiply it by 142, which means adding 797 to itself 142 times.
Step 1: 0 + 797 = 797
Step 2: 797 + 797 = 1594
Step 3: 1594 + 797 = 2391
Step 4: 2391 + 797 = 3188
Step 5: 3188 + 797 = 3985
Step 6: 3985 + 797 = 4782
Step 7: 4782 + 797 = 5579
Step 8: 5579 + 797 = 6376
Step 9: 6376 + 797 = 7173
Step 10: 7173 + 797 = 7970
Step 11: 7970 + 797 = 8767
Step 12: 8767 + 797 = 9564
Step 13: 9564 + 797 = 10361
Step 14: 10361 + 797 = 11158
Step 15: 11158 + 797 = 11955
Step 16: 11955 + 797 = 12752
Step 17: 12752 + 797 = 13549
Step 18: 13549 + 797 = 14346
Step 19: 14346 + 797 = 15143
Step 20: 15143 + 797 = 15940
Step 21: 15940 + 797 = 16737
Step 22: 16737 + 797 = 17534
Step 23: 17534 + 797 = 18331
Step 24: 18331 + 797 = 19128
Step 25: 19128 + 797 = 19925
Step 26: 19925 + 797 = 20722
Step 27: 20722 + 797 = 21519
Step 28: 21519 + 797 = 22316
Step 29: 22316 + 797 = 23113
Step 30: 23113 + 797 = 23910
Step 31: 23910 + 797 = 24707
Step 32: 24707 + 797 = 25504
Step 33: 25504 + 797 = 26301
Step 34: 26301 + 797 = 27098
Step 35: 27098 + 797 = 27895
Step 36: 27895 + 797 = 28692
Step 37: 28692 + 797 = 29489
Step 38: 29489 + 797 = 30286
Step 39: 30286 + 797 = 31083
Step 40: 31083 + 797 = 31880
Step 41: 31880 + 797 = 32677
Step 42: 32677 + 797 = 33474
Step 43: 33474 + 797 = 34271
Step 44: 34271 + 797 = 35068
Step 45: 35068 + 797 = 35865
Step 46: 35865 + 797 = 36662
Step 47: 36662 + 797 = 37459
Step 48: 37459 + 797 = 38256
Step 49: 38256 + 797 = 39053
Step 50: 39053 + 797 = 39850
Step 51: 39850 + 797 = 40647
Step 52: 40647 + 797 = 41444
Step 53: 41444 + 797 = 42241
Step 54: 42241 + 797 = 43038
Step 55: 43038 + 797 = 43835
Step 56: 43835 + 797 = 44632
Step 57: 44632 + 797 = 45429
Step 58: 45429 + 797 = 46226
Step 59: 46226 + 797 = 47023
Step 60: 47023 + 797 = 47820
Step 61: 47820 + 797 = 48617
Step 62: 48617 + 797 = 49414
Step 63: 49414 + 797 = 50211
Step 64: 50211 + 797 = 51008
Step 65: 51008 + 797 = 51805
Step 66: 51805 + 797 = 52602
Step 67: 52602 + 797 = 53399
Step 68: 53399 + 797 = 54196
Step 69: 54196 + 797 = 54993
Step 70: 54993 + 797 = 55790
Step 71: 55790 + 797 = 56587
Step 72: 56587 + 797 = 57384
Step 73: 57384 + 797 = 58181
Step 74: 58181 + 797 = 58978
Step 75: 58978 + 797 = 59775
Step 76: 59775 + 797 = 60572
Step 77: 60572 + 797 = 61369
Step 78: 61369 + 797 = 62166
Step 79: 62166 + 797 = 62963
Step 80: 62963 + 797 = 63760
Step 81: 63760 + 797 = 64557
Step 82: 64557 + 797 = 65354
Step 83: 65354 + 797 = 66151
Step 84: 66151 + 797 = 66948
Step 85: 66948 + 797 = 67745
Step 86: 67745 + 797 = 68542
Step 87: 68542 + 797 = 69339
Step 88: 69339 + 797 = 70136
Step 89: 70136 + 797 = 70933
Step 90: 70933 + 797 = 71730
Step 91: 71730 + 797 = 72527
Step 92: 72527 + 797 = 73324
Step 93: 73324 + 797 = 74121
Step 94: 74121 + 797 = 74918
Step 95: 74918 + 797 = 75715
Step 96: 75715 + 797 = 76512
Step 97: 76512 + 797 = 77309
Step 98: 77309 + 797 = 78106
Step 99: 78106 + 797 = 78903
Step 100: 78903 + 797 = 79700
Step 101: 79700 + 797 = 80497
Step 102: 80497 + 797 = 81294
Step 103: 81294 + 797 = 82091
Step 104: 82091 + 797 = 82888
Step 105: 82888 + 797 = 83685
Step 106: 83685 + 797 = 84482
Step 107: 84482 + 797 = 85279
Step 108: 85279 + 797 = 86076
Step 109: 86076 + 797 = 86873
Step 110: 86873 + 797 = 87670
Step 111: 87670 + 797 = 88467
Step 112: 88467 + 797 = 89264
Step 113: 89264 + 797 = 90061
Step 114: 90061 + 797 = 90858
Step 115: 90858 + 797 = 91655
Step 116: 91655 + 797 = 92452
Step 117: 92452 + 797 = 93249
Step 118: 93249 + 797 = 94046
Step 119: 94046 + 797 = 94843
Step 120: 94843 + 797 = 95640
Step 121: 95640 + 797 = 96437
Step 122: 96437 + 797 = 97234
Step 123: 97234 + 797 = 98031
Step 124: 98031 + 797 = 98828
Step 125: 98828 + 797 = 99625
Step 126: 99625 + 797 = 100422
Step 127: 100422 + 797 = 101219
Step 128: 101219 + 797 = 102016
Step 129: 102016 + 797 = 102813
Step 130: 102813 + 797 = 103610
Step 131: 103610 + 797 = 104407
Step 132: 104407 + 797 = 105204
Step 133: 105204 + 797 = 106001
Step 134: 106001 + 797 = 106798
Step 135: 106798 + 797 = 107595
Step 136: 107595 + 797 = 108392
Step 137: 108392 + 797 = 109189
Step 138: 109189 + 797 = 109986
Step 139: 109986 + 797 = 110783
Step 140: 110783 + 797 = 111580
Step 141: 111580 + 797 = 112377
Step 142: 112377 + 797 = 113174

So, 797*142 = 113174