Let's roll up our sleeves and solve this. We have 841 and we're going to multiply it by 160, essentially adding 841 to itself 160 times.
Step 1: 0 + 841 = 841
Step 2: 841 + 841 = 1682
Step 3: 1682 + 841 = 2523
Step 4: 2523 + 841 = 3364
Step 5: 3364 + 841 = 4205
Step 6: 4205 + 841 = 5046
Step 7: 5046 + 841 = 5887
Step 8: 5887 + 841 = 6728
Step 9: 6728 + 841 = 7569
Step 10: 7569 + 841 = 8410
Step 11: 8410 + 841 = 9251
Step 12: 9251 + 841 = 10092
Step 13: 10092 + 841 = 10933
Step 14: 10933 + 841 = 11774
Step 15: 11774 + 841 = 12615
Step 16: 12615 + 841 = 13456
Step 17: 13456 + 841 = 14297
Step 18: 14297 + 841 = 15138
Step 19: 15138 + 841 = 15979
Step 20: 15979 + 841 = 16820
Step 21: 16820 + 841 = 17661
Step 22: 17661 + 841 = 18502
Step 23: 18502 + 841 = 19343
Step 24: 19343 + 841 = 20184
Step 25: 20184 + 841 = 21025
Step 26: 21025 + 841 = 21866
Step 27: 21866 + 841 = 22707
Step 28: 22707 + 841 = 23548
Step 29: 23548 + 841 = 24389
Step 30: 24389 + 841 = 25230
Step 31: 25230 + 841 = 26071
Step 32: 26071 + 841 = 26912
Step 33: 26912 + 841 = 27753
Step 34: 27753 + 841 = 28594
Step 35: 28594 + 841 = 29435
Step 36: 29435 + 841 = 30276
Step 37: 30276 + 841 = 31117
Step 38: 31117 + 841 = 31958
Step 39: 31958 + 841 = 32799
Step 40: 32799 + 841 = 33640
Step 41: 33640 + 841 = 34481
Step 42: 34481 + 841 = 35322
Step 43: 35322 + 841 = 36163
Step 44: 36163 + 841 = 37004
Step 45: 37004 + 841 = 37845
Step 46: 37845 + 841 = 38686
Step 47: 38686 + 841 = 39527
Step 48: 39527 + 841 = 40368
Step 49: 40368 + 841 = 41209
Step 50: 41209 + 841 = 42050
Step 51: 42050 + 841 = 42891
Step 52: 42891 + 841 = 43732
Step 53: 43732 + 841 = 44573
Step 54: 44573 + 841 = 45414
Step 55: 45414 + 841 = 46255
Step 56: 46255 + 841 = 47096
Step 57: 47096 + 841 = 47937
Step 58: 47937 + 841 = 48778
Step 59: 48778 + 841 = 49619
Step 60: 49619 + 841 = 50460
Step 61: 50460 + 841 = 51301
Step 62: 51301 + 841 = 52142
Step 63: 52142 + 841 = 52983
Step 64: 52983 + 841 = 53824
Step 65: 53824 + 841 = 54665
Step 66: 54665 + 841 = 55506
Step 67: 55506 + 841 = 56347
Step 68: 56347 + 841 = 57188
Step 69: 57188 + 841 = 58029
Step 70: 58029 + 841 = 58870
Step 71: 58870 + 841 = 59711
Step 72: 59711 + 841 = 60552
Step 73: 60552 + 841 = 61393
Step 74: 61393 + 841 = 62234
Step 75: 62234 + 841 = 63075
Step 76: 63075 + 841 = 63916
Step 77: 63916 + 841 = 64757
Step 78: 64757 + 841 = 65598
Step 79: 65598 + 841 = 66439
Step 80: 66439 + 841 = 67280
Step 81: 67280 + 841 = 68121
Step 82: 68121 + 841 = 68962
Step 83: 68962 + 841 = 69803
Step 84: 69803 + 841 = 70644
Step 85: 70644 + 841 = 71485
Step 86: 71485 + 841 = 72326
Step 87: 72326 + 841 = 73167
Step 88: 73167 + 841 = 74008
Step 89: 74008 + 841 = 74849
Step 90: 74849 + 841 = 75690
Step 91: 75690 + 841 = 76531
Step 92: 76531 + 841 = 77372
Step 93: 77372 + 841 = 78213
Step 94: 78213 + 841 = 79054
Step 95: 79054 + 841 = 79895
Step 96: 79895 + 841 = 80736
Step 97: 80736 + 841 = 81577
Step 98: 81577 + 841 = 82418
Step 99: 82418 + 841 = 83259
Step 100: 83259 + 841 = 84100
Step 101: 84100 + 841 = 84941
Step 102: 84941 + 841 = 85782
Step 103: 85782 + 841 = 86623
Step 104: 86623 + 841 = 87464
Step 105: 87464 + 841 = 88305
Step 106: 88305 + 841 = 89146
Step 107: 89146 + 841 = 89987
Step 108: 89987 + 841 = 90828
Step 109: 90828 + 841 = 91669
Step 110: 91669 + 841 = 92510
Step 111: 92510 + 841 = 93351
Step 112: 93351 + 841 = 94192
Step 113: 94192 + 841 = 95033
Step 114: 95033 + 841 = 95874
Step 115: 95874 + 841 = 96715
Step 116: 96715 + 841 = 97556
Step 117: 97556 + 841 = 98397
Step 118: 98397 + 841 = 99238
Step 119: 99238 + 841 = 100079
Step 120: 100079 + 841 = 100920
Step 121: 100920 + 841 = 101761
Step 122: 101761 + 841 = 102602
Step 123: 102602 + 841 = 103443
Step 124: 103443 + 841 = 104284
Step 125: 104284 + 841 = 105125
Step 126: 105125 + 841 = 105966
Step 127: 105966 + 841 = 106807
Step 128: 106807 + 841 = 107648
Step 129: 107648 + 841 = 108489
Step 130: 108489 + 841 = 109330
Step 131: 109330 + 841 = 110171
Step 132: 110171 + 841 = 111012
Step 133: 111012 + 841 = 111853
Step 134: 111853 + 841 = 112694
Step 135: 112694 + 841 = 113535
Step 136: 113535 + 841 = 114376
Step 137: 114376 + 841 = 115217
Step 138: 115217 + 841 = 116058
Step 139: 116058 + 841 = 116899
Step 140: 116899 + 841 = 117740
Step 141: 117740 + 841 = 118581
Step 142: 118581 + 841 = 119422
Step 143: 119422 + 841 = 120263
Step 144: 120263 + 841 = 121104
Step 145: 121104 + 841 = 121945
Step 146: 121945 + 841 = 122786
Step 147: 122786 + 841 = 123627
Step 148: 123627 + 841 = 124468
Step 149: 124468 + 841 = 125309
Step 150: 125309 + 841 = 126150
Step 151: 126150 + 841 = 126991
Step 152: 126991 + 841 = 127832
Step 153: 127832 + 841 = 128673
Step 154: 128673 + 841 = 129514
Step 155: 129514 + 841 = 130355
Step 156: 130355 + 841 = 131196
Step 157: 131196 + 841 = 132037
Step 158: 132037 + 841 = 132878
Step 159: 132878 + 841 = 133719
Step 160: 133719 + 841 = 134560

So, 841*160 = 134560