Let's roll up our sleeves and solve this. We have 865 and we're going to multiply it by 151, essentially adding 865 to itself 151 times.
Step 1: 0 + 865 = 865
Step 2: 865 + 865 = 1730
Step 3: 1730 + 865 = 2595
Step 4: 2595 + 865 = 3460
Step 5: 3460 + 865 = 4325
Step 6: 4325 + 865 = 5190
Step 7: 5190 + 865 = 6055
Step 8: 6055 + 865 = 6920
Step 9: 6920 + 865 = 7785
Step 10: 7785 + 865 = 8650
Step 11: 8650 + 865 = 9515
Step 12: 9515 + 865 = 10380
Step 13: 10380 + 865 = 11245
Step 14: 11245 + 865 = 12110
Step 15: 12110 + 865 = 12975
Step 16: 12975 + 865 = 13840
Step 17: 13840 + 865 = 14705
Step 18: 14705 + 865 = 15570
Step 19: 15570 + 865 = 16435
Step 20: 16435 + 865 = 17300
Step 21: 17300 + 865 = 18165
Step 22: 18165 + 865 = 19030
Step 23: 19030 + 865 = 19895
Step 24: 19895 + 865 = 20760
Step 25: 20760 + 865 = 21625
Step 26: 21625 + 865 = 22490
Step 27: 22490 + 865 = 23355
Step 28: 23355 + 865 = 24220
Step 29: 24220 + 865 = 25085
Step 30: 25085 + 865 = 25950
Step 31: 25950 + 865 = 26815
Step 32: 26815 + 865 = 27680
Step 33: 27680 + 865 = 28545
Step 34: 28545 + 865 = 29410
Step 35: 29410 + 865 = 30275
Step 36: 30275 + 865 = 31140
Step 37: 31140 + 865 = 32005
Step 38: 32005 + 865 = 32870
Step 39: 32870 + 865 = 33735
Step 40: 33735 + 865 = 34600
Step 41: 34600 + 865 = 35465
Step 42: 35465 + 865 = 36330
Step 43: 36330 + 865 = 37195
Step 44: 37195 + 865 = 38060
Step 45: 38060 + 865 = 38925
Step 46: 38925 + 865 = 39790
Step 47: 39790 + 865 = 40655
Step 48: 40655 + 865 = 41520
Step 49: 41520 + 865 = 42385
Step 50: 42385 + 865 = 43250
Step 51: 43250 + 865 = 44115
Step 52: 44115 + 865 = 44980
Step 53: 44980 + 865 = 45845
Step 54: 45845 + 865 = 46710
Step 55: 46710 + 865 = 47575
Step 56: 47575 + 865 = 48440
Step 57: 48440 + 865 = 49305
Step 58: 49305 + 865 = 50170
Step 59: 50170 + 865 = 51035
Step 60: 51035 + 865 = 51900
Step 61: 51900 + 865 = 52765
Step 62: 52765 + 865 = 53630
Step 63: 53630 + 865 = 54495
Step 64: 54495 + 865 = 55360
Step 65: 55360 + 865 = 56225
Step 66: 56225 + 865 = 57090
Step 67: 57090 + 865 = 57955
Step 68: 57955 + 865 = 58820
Step 69: 58820 + 865 = 59685
Step 70: 59685 + 865 = 60550
Step 71: 60550 + 865 = 61415
Step 72: 61415 + 865 = 62280
Step 73: 62280 + 865 = 63145
Step 74: 63145 + 865 = 64010
Step 75: 64010 + 865 = 64875
Step 76: 64875 + 865 = 65740
Step 77: 65740 + 865 = 66605
Step 78: 66605 + 865 = 67470
Step 79: 67470 + 865 = 68335
Step 80: 68335 + 865 = 69200
Step 81: 69200 + 865 = 70065
Step 82: 70065 + 865 = 70930
Step 83: 70930 + 865 = 71795
Step 84: 71795 + 865 = 72660
Step 85: 72660 + 865 = 73525
Step 86: 73525 + 865 = 74390
Step 87: 74390 + 865 = 75255
Step 88: 75255 + 865 = 76120
Step 89: 76120 + 865 = 76985
Step 90: 76985 + 865 = 77850
Step 91: 77850 + 865 = 78715
Step 92: 78715 + 865 = 79580
Step 93: 79580 + 865 = 80445
Step 94: 80445 + 865 = 81310
Step 95: 81310 + 865 = 82175
Step 96: 82175 + 865 = 83040
Step 97: 83040 + 865 = 83905
Step 98: 83905 + 865 = 84770
Step 99: 84770 + 865 = 85635
Step 100: 85635 + 865 = 86500
Step 101: 86500 + 865 = 87365
Step 102: 87365 + 865 = 88230
Step 103: 88230 + 865 = 89095
Step 104: 89095 + 865 = 89960
Step 105: 89960 + 865 = 90825
Step 106: 90825 + 865 = 91690
Step 107: 91690 + 865 = 92555
Step 108: 92555 + 865 = 93420
Step 109: 93420 + 865 = 94285
Step 110: 94285 + 865 = 95150
Step 111: 95150 + 865 = 96015
Step 112: 96015 + 865 = 96880
Step 113: 96880 + 865 = 97745
Step 114: 97745 + 865 = 98610
Step 115: 98610 + 865 = 99475
Step 116: 99475 + 865 = 100340
Step 117: 100340 + 865 = 101205
Step 118: 101205 + 865 = 102070
Step 119: 102070 + 865 = 102935
Step 120: 102935 + 865 = 103800
Step 121: 103800 + 865 = 104665
Step 122: 104665 + 865 = 105530
Step 123: 105530 + 865 = 106395
Step 124: 106395 + 865 = 107260
Step 125: 107260 + 865 = 108125
Step 126: 108125 + 865 = 108990
Step 127: 108990 + 865 = 109855
Step 128: 109855 + 865 = 110720
Step 129: 110720 + 865 = 111585
Step 130: 111585 + 865 = 112450
Step 131: 112450 + 865 = 113315
Step 132: 113315 + 865 = 114180
Step 133: 114180 + 865 = 115045
Step 134: 115045 + 865 = 115910
Step 135: 115910 + 865 = 116775
Step 136: 116775 + 865 = 117640
Step 137: 117640 + 865 = 118505
Step 138: 118505 + 865 = 119370
Step 139: 119370 + 865 = 120235
Step 140: 120235 + 865 = 121100
Step 141: 121100 + 865 = 121965
Step 142: 121965 + 865 = 122830
Step 143: 122830 + 865 = 123695
Step 144: 123695 + 865 = 124560
Step 145: 124560 + 865 = 125425
Step 146: 125425 + 865 = 126290
Step 147: 126290 + 865 = 127155
Step 148: 127155 + 865 = 128020
Step 149: 128020 + 865 = 128885
Step 150: 128885 + 865 = 129750
Step 151: 129750 + 865 = 130615

So, 865*151 = 130615