Let's roll up our sleeves and solve this. We have 854 and we're going to multiply it by 159, essentially adding 854 to itself 159 times.
Step 1: 0 + 854 = 854
Step 2: 854 + 854 = 1708
Step 3: 1708 + 854 = 2562
Step 4: 2562 + 854 = 3416
Step 5: 3416 + 854 = 4270
Step 6: 4270 + 854 = 5124
Step 7: 5124 + 854 = 5978
Step 8: 5978 + 854 = 6832
Step 9: 6832 + 854 = 7686
Step 10: 7686 + 854 = 8540
Step 11: 8540 + 854 = 9394
Step 12: 9394 + 854 = 10248
Step 13: 10248 + 854 = 11102
Step 14: 11102 + 854 = 11956
Step 15: 11956 + 854 = 12810
Step 16: 12810 + 854 = 13664
Step 17: 13664 + 854 = 14518
Step 18: 14518 + 854 = 15372
Step 19: 15372 + 854 = 16226
Step 20: 16226 + 854 = 17080
Step 21: 17080 + 854 = 17934
Step 22: 17934 + 854 = 18788
Step 23: 18788 + 854 = 19642
Step 24: 19642 + 854 = 20496
Step 25: 20496 + 854 = 21350
Step 26: 21350 + 854 = 22204
Step 27: 22204 + 854 = 23058
Step 28: 23058 + 854 = 23912
Step 29: 23912 + 854 = 24766
Step 30: 24766 + 854 = 25620
Step 31: 25620 + 854 = 26474
Step 32: 26474 + 854 = 27328
Step 33: 27328 + 854 = 28182
Step 34: 28182 + 854 = 29036
Step 35: 29036 + 854 = 29890
Step 36: 29890 + 854 = 30744
Step 37: 30744 + 854 = 31598
Step 38: 31598 + 854 = 32452
Step 39: 32452 + 854 = 33306
Step 40: 33306 + 854 = 34160
Step 41: 34160 + 854 = 35014
Step 42: 35014 + 854 = 35868
Step 43: 35868 + 854 = 36722
Step 44: 36722 + 854 = 37576
Step 45: 37576 + 854 = 38430
Step 46: 38430 + 854 = 39284
Step 47: 39284 + 854 = 40138
Step 48: 40138 + 854 = 40992
Step 49: 40992 + 854 = 41846
Step 50: 41846 + 854 = 42700
Step 51: 42700 + 854 = 43554
Step 52: 43554 + 854 = 44408
Step 53: 44408 + 854 = 45262
Step 54: 45262 + 854 = 46116
Step 55: 46116 + 854 = 46970
Step 56: 46970 + 854 = 47824
Step 57: 47824 + 854 = 48678
Step 58: 48678 + 854 = 49532
Step 59: 49532 + 854 = 50386
Step 60: 50386 + 854 = 51240
Step 61: 51240 + 854 = 52094
Step 62: 52094 + 854 = 52948
Step 63: 52948 + 854 = 53802
Step 64: 53802 + 854 = 54656
Step 65: 54656 + 854 = 55510
Step 66: 55510 + 854 = 56364
Step 67: 56364 + 854 = 57218
Step 68: 57218 + 854 = 58072
Step 69: 58072 + 854 = 58926
Step 70: 58926 + 854 = 59780
Step 71: 59780 + 854 = 60634
Step 72: 60634 + 854 = 61488
Step 73: 61488 + 854 = 62342
Step 74: 62342 + 854 = 63196
Step 75: 63196 + 854 = 64050
Step 76: 64050 + 854 = 64904
Step 77: 64904 + 854 = 65758
Step 78: 65758 + 854 = 66612
Step 79: 66612 + 854 = 67466
Step 80: 67466 + 854 = 68320
Step 81: 68320 + 854 = 69174
Step 82: 69174 + 854 = 70028
Step 83: 70028 + 854 = 70882
Step 84: 70882 + 854 = 71736
Step 85: 71736 + 854 = 72590
Step 86: 72590 + 854 = 73444
Step 87: 73444 + 854 = 74298
Step 88: 74298 + 854 = 75152
Step 89: 75152 + 854 = 76006
Step 90: 76006 + 854 = 76860
Step 91: 76860 + 854 = 77714
Step 92: 77714 + 854 = 78568
Step 93: 78568 + 854 = 79422
Step 94: 79422 + 854 = 80276
Step 95: 80276 + 854 = 81130
Step 96: 81130 + 854 = 81984
Step 97: 81984 + 854 = 82838
Step 98: 82838 + 854 = 83692
Step 99: 83692 + 854 = 84546
Step 100: 84546 + 854 = 85400
Step 101: 85400 + 854 = 86254
Step 102: 86254 + 854 = 87108
Step 103: 87108 + 854 = 87962
Step 104: 87962 + 854 = 88816
Step 105: 88816 + 854 = 89670
Step 106: 89670 + 854 = 90524
Step 107: 90524 + 854 = 91378
Step 108: 91378 + 854 = 92232
Step 109: 92232 + 854 = 93086
Step 110: 93086 + 854 = 93940
Step 111: 93940 + 854 = 94794
Step 112: 94794 + 854 = 95648
Step 113: 95648 + 854 = 96502
Step 114: 96502 + 854 = 97356
Step 115: 97356 + 854 = 98210
Step 116: 98210 + 854 = 99064
Step 117: 99064 + 854 = 99918
Step 118: 99918 + 854 = 100772
Step 119: 100772 + 854 = 101626
Step 120: 101626 + 854 = 102480
Step 121: 102480 + 854 = 103334
Step 122: 103334 + 854 = 104188
Step 123: 104188 + 854 = 105042
Step 124: 105042 + 854 = 105896
Step 125: 105896 + 854 = 106750
Step 126: 106750 + 854 = 107604
Step 127: 107604 + 854 = 108458
Step 128: 108458 + 854 = 109312
Step 129: 109312 + 854 = 110166
Step 130: 110166 + 854 = 111020
Step 131: 111020 + 854 = 111874
Step 132: 111874 + 854 = 112728
Step 133: 112728 + 854 = 113582
Step 134: 113582 + 854 = 114436
Step 135: 114436 + 854 = 115290
Step 136: 115290 + 854 = 116144
Step 137: 116144 + 854 = 116998
Step 138: 116998 + 854 = 117852
Step 139: 117852 + 854 = 118706
Step 140: 118706 + 854 = 119560
Step 141: 119560 + 854 = 120414
Step 142: 120414 + 854 = 121268
Step 143: 121268 + 854 = 122122
Step 144: 122122 + 854 = 122976
Step 145: 122976 + 854 = 123830
Step 146: 123830 + 854 = 124684
Step 147: 124684 + 854 = 125538
Step 148: 125538 + 854 = 126392
Step 149: 126392 + 854 = 127246
Step 150: 127246 + 854 = 128100
Step 151: 128100 + 854 = 128954
Step 152: 128954 + 854 = 129808
Step 153: 129808 + 854 = 130662
Step 154: 130662 + 854 = 131516
Step 155: 131516 + 854 = 132370
Step 156: 132370 + 854 = 133224
Step 157: 133224 + 854 = 134078
Step 158: 134078 + 854 = 134932
Step 159: 134932 + 854 = 135786

So, 854*159 = 135786