Alright, let's solve this math problem step by step. First, we have the number 842. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 145. So, we're going to take the number 842 and add it to itself 145 times.
Step 1: 0 + 842 = 842
Step 2: 842 + 842 = 1684
Step 3: 1684 + 842 = 2526
Step 4: 2526 + 842 = 3368
Step 5: 3368 + 842 = 4210
Step 6: 4210 + 842 = 5052
Step 7: 5052 + 842 = 5894
Step 8: 5894 + 842 = 6736
Step 9: 6736 + 842 = 7578
Step 10: 7578 + 842 = 8420
Step 11: 8420 + 842 = 9262
Step 12: 9262 + 842 = 10104
Step 13: 10104 + 842 = 10946
Step 14: 10946 + 842 = 11788
Step 15: 11788 + 842 = 12630
Step 16: 12630 + 842 = 13472
Step 17: 13472 + 842 = 14314
Step 18: 14314 + 842 = 15156
Step 19: 15156 + 842 = 15998
Step 20: 15998 + 842 = 16840
Step 21: 16840 + 842 = 17682
Step 22: 17682 + 842 = 18524
Step 23: 18524 + 842 = 19366
Step 24: 19366 + 842 = 20208
Step 25: 20208 + 842 = 21050
Step 26: 21050 + 842 = 21892
Step 27: 21892 + 842 = 22734
Step 28: 22734 + 842 = 23576
Step 29: 23576 + 842 = 24418
Step 30: 24418 + 842 = 25260
Step 31: 25260 + 842 = 26102
Step 32: 26102 + 842 = 26944
Step 33: 26944 + 842 = 27786
Step 34: 27786 + 842 = 28628
Step 35: 28628 + 842 = 29470
Step 36: 29470 + 842 = 30312
Step 37: 30312 + 842 = 31154
Step 38: 31154 + 842 = 31996
Step 39: 31996 + 842 = 32838
Step 40: 32838 + 842 = 33680
Step 41: 33680 + 842 = 34522
Step 42: 34522 + 842 = 35364
Step 43: 35364 + 842 = 36206
Step 44: 36206 + 842 = 37048
Step 45: 37048 + 842 = 37890
Step 46: 37890 + 842 = 38732
Step 47: 38732 + 842 = 39574
Step 48: 39574 + 842 = 40416
Step 49: 40416 + 842 = 41258
Step 50: 41258 + 842 = 42100
Step 51: 42100 + 842 = 42942
Step 52: 42942 + 842 = 43784
Step 53: 43784 + 842 = 44626
Step 54: 44626 + 842 = 45468
Step 55: 45468 + 842 = 46310
Step 56: 46310 + 842 = 47152
Step 57: 47152 + 842 = 47994
Step 58: 47994 + 842 = 48836
Step 59: 48836 + 842 = 49678
Step 60: 49678 + 842 = 50520
Step 61: 50520 + 842 = 51362
Step 62: 51362 + 842 = 52204
Step 63: 52204 + 842 = 53046
Step 64: 53046 + 842 = 53888
Step 65: 53888 + 842 = 54730
Step 66: 54730 + 842 = 55572
Step 67: 55572 + 842 = 56414
Step 68: 56414 + 842 = 57256
Step 69: 57256 + 842 = 58098
Step 70: 58098 + 842 = 58940
Step 71: 58940 + 842 = 59782
Step 72: 59782 + 842 = 60624
Step 73: 60624 + 842 = 61466
Step 74: 61466 + 842 = 62308
Step 75: 62308 + 842 = 63150
Step 76: 63150 + 842 = 63992
Step 77: 63992 + 842 = 64834
Step 78: 64834 + 842 = 65676
Step 79: 65676 + 842 = 66518
Step 80: 66518 + 842 = 67360
Step 81: 67360 + 842 = 68202
Step 82: 68202 + 842 = 69044
Step 83: 69044 + 842 = 69886
Step 84: 69886 + 842 = 70728
Step 85: 70728 + 842 = 71570
Step 86: 71570 + 842 = 72412
Step 87: 72412 + 842 = 73254
Step 88: 73254 + 842 = 74096
Step 89: 74096 + 842 = 74938
Step 90: 74938 + 842 = 75780
Step 91: 75780 + 842 = 76622
Step 92: 76622 + 842 = 77464
Step 93: 77464 + 842 = 78306
Step 94: 78306 + 842 = 79148
Step 95: 79148 + 842 = 79990
Step 96: 79990 + 842 = 80832
Step 97: 80832 + 842 = 81674
Step 98: 81674 + 842 = 82516
Step 99: 82516 + 842 = 83358
Step 100: 83358 + 842 = 84200
Step 101: 84200 + 842 = 85042
Step 102: 85042 + 842 = 85884
Step 103: 85884 + 842 = 86726
Step 104: 86726 + 842 = 87568
Step 105: 87568 + 842 = 88410
Step 106: 88410 + 842 = 89252
Step 107: 89252 + 842 = 90094
Step 108: 90094 + 842 = 90936
Step 109: 90936 + 842 = 91778
Step 110: 91778 + 842 = 92620
Step 111: 92620 + 842 = 93462
Step 112: 93462 + 842 = 94304
Step 113: 94304 + 842 = 95146
Step 114: 95146 + 842 = 95988
Step 115: 95988 + 842 = 96830
Step 116: 96830 + 842 = 97672
Step 117: 97672 + 842 = 98514
Step 118: 98514 + 842 = 99356
Step 119: 99356 + 842 = 100198
Step 120: 100198 + 842 = 101040
Step 121: 101040 + 842 = 101882
Step 122: 101882 + 842 = 102724
Step 123: 102724 + 842 = 103566
Step 124: 103566 + 842 = 104408
Step 125: 104408 + 842 = 105250
Step 126: 105250 + 842 = 106092
Step 127: 106092 + 842 = 106934
Step 128: 106934 + 842 = 107776
Step 129: 107776 + 842 = 108618
Step 130: 108618 + 842 = 109460
Step 131: 109460 + 842 = 110302
Step 132: 110302 + 842 = 111144
Step 133: 111144 + 842 = 111986
Step 134: 111986 + 842 = 112828
Step 135: 112828 + 842 = 113670
Step 136: 113670 + 842 = 114512
Step 137: 114512 + 842 = 115354
Step 138: 115354 + 842 = 116196
Step 139: 116196 + 842 = 117038
Step 140: 117038 + 842 = 117880
Step 141: 117880 + 842 = 118722
Step 142: 118722 + 842 = 119564
Step 143: 119564 + 842 = 120406
Step 144: 120406 + 842 = 121248
Step 145: 121248 + 842 = 122090

So, 842*145 = 122090