Sure thing, let's get straight to it. We start with 805 and we're going to multiply it by 150, which means adding 805 to itself 150 times.
Step 1: 0 + 805 = 805
Step 2: 805 + 805 = 1610
Step 3: 1610 + 805 = 2415
Step 4: 2415 + 805 = 3220
Step 5: 3220 + 805 = 4025
Step 6: 4025 + 805 = 4830
Step 7: 4830 + 805 = 5635
Step 8: 5635 + 805 = 6440
Step 9: 6440 + 805 = 7245
Step 10: 7245 + 805 = 8050
Step 11: 8050 + 805 = 8855
Step 12: 8855 + 805 = 9660
Step 13: 9660 + 805 = 10465
Step 14: 10465 + 805 = 11270
Step 15: 11270 + 805 = 12075
Step 16: 12075 + 805 = 12880
Step 17: 12880 + 805 = 13685
Step 18: 13685 + 805 = 14490
Step 19: 14490 + 805 = 15295
Step 20: 15295 + 805 = 16100
Step 21: 16100 + 805 = 16905
Step 22: 16905 + 805 = 17710
Step 23: 17710 + 805 = 18515
Step 24: 18515 + 805 = 19320
Step 25: 19320 + 805 = 20125
Step 26: 20125 + 805 = 20930
Step 27: 20930 + 805 = 21735
Step 28: 21735 + 805 = 22540
Step 29: 22540 + 805 = 23345
Step 30: 23345 + 805 = 24150
Step 31: 24150 + 805 = 24955
Step 32: 24955 + 805 = 25760
Step 33: 25760 + 805 = 26565
Step 34: 26565 + 805 = 27370
Step 35: 27370 + 805 = 28175
Step 36: 28175 + 805 = 28980
Step 37: 28980 + 805 = 29785
Step 38: 29785 + 805 = 30590
Step 39: 30590 + 805 = 31395
Step 40: 31395 + 805 = 32200
Step 41: 32200 + 805 = 33005
Step 42: 33005 + 805 = 33810
Step 43: 33810 + 805 = 34615
Step 44: 34615 + 805 = 35420
Step 45: 35420 + 805 = 36225
Step 46: 36225 + 805 = 37030
Step 47: 37030 + 805 = 37835
Step 48: 37835 + 805 = 38640
Step 49: 38640 + 805 = 39445
Step 50: 39445 + 805 = 40250
Step 51: 40250 + 805 = 41055
Step 52: 41055 + 805 = 41860
Step 53: 41860 + 805 = 42665
Step 54: 42665 + 805 = 43470
Step 55: 43470 + 805 = 44275
Step 56: 44275 + 805 = 45080
Step 57: 45080 + 805 = 45885
Step 58: 45885 + 805 = 46690
Step 59: 46690 + 805 = 47495
Step 60: 47495 + 805 = 48300
Step 61: 48300 + 805 = 49105
Step 62: 49105 + 805 = 49910
Step 63: 49910 + 805 = 50715
Step 64: 50715 + 805 = 51520
Step 65: 51520 + 805 = 52325
Step 66: 52325 + 805 = 53130
Step 67: 53130 + 805 = 53935
Step 68: 53935 + 805 = 54740
Step 69: 54740 + 805 = 55545
Step 70: 55545 + 805 = 56350
Step 71: 56350 + 805 = 57155
Step 72: 57155 + 805 = 57960
Step 73: 57960 + 805 = 58765
Step 74: 58765 + 805 = 59570
Step 75: 59570 + 805 = 60375
Step 76: 60375 + 805 = 61180
Step 77: 61180 + 805 = 61985
Step 78: 61985 + 805 = 62790
Step 79: 62790 + 805 = 63595
Step 80: 63595 + 805 = 64400
Step 81: 64400 + 805 = 65205
Step 82: 65205 + 805 = 66010
Step 83: 66010 + 805 = 66815
Step 84: 66815 + 805 = 67620
Step 85: 67620 + 805 = 68425
Step 86: 68425 + 805 = 69230
Step 87: 69230 + 805 = 70035
Step 88: 70035 + 805 = 70840
Step 89: 70840 + 805 = 71645
Step 90: 71645 + 805 = 72450
Step 91: 72450 + 805 = 73255
Step 92: 73255 + 805 = 74060
Step 93: 74060 + 805 = 74865
Step 94: 74865 + 805 = 75670
Step 95: 75670 + 805 = 76475
Step 96: 76475 + 805 = 77280
Step 97: 77280 + 805 = 78085
Step 98: 78085 + 805 = 78890
Step 99: 78890 + 805 = 79695
Step 100: 79695 + 805 = 80500
Step 101: 80500 + 805 = 81305
Step 102: 81305 + 805 = 82110
Step 103: 82110 + 805 = 82915
Step 104: 82915 + 805 = 83720
Step 105: 83720 + 805 = 84525
Step 106: 84525 + 805 = 85330
Step 107: 85330 + 805 = 86135
Step 108: 86135 + 805 = 86940
Step 109: 86940 + 805 = 87745
Step 110: 87745 + 805 = 88550
Step 111: 88550 + 805 = 89355
Step 112: 89355 + 805 = 90160
Step 113: 90160 + 805 = 90965
Step 114: 90965 + 805 = 91770
Step 115: 91770 + 805 = 92575
Step 116: 92575 + 805 = 93380
Step 117: 93380 + 805 = 94185
Step 118: 94185 + 805 = 94990
Step 119: 94990 + 805 = 95795
Step 120: 95795 + 805 = 96600
Step 121: 96600 + 805 = 97405
Step 122: 97405 + 805 = 98210
Step 123: 98210 + 805 = 99015
Step 124: 99015 + 805 = 99820
Step 125: 99820 + 805 = 100625
Step 126: 100625 + 805 = 101430
Step 127: 101430 + 805 = 102235
Step 128: 102235 + 805 = 103040
Step 129: 103040 + 805 = 103845
Step 130: 103845 + 805 = 104650
Step 131: 104650 + 805 = 105455
Step 132: 105455 + 805 = 106260
Step 133: 106260 + 805 = 107065
Step 134: 107065 + 805 = 107870
Step 135: 107870 + 805 = 108675
Step 136: 108675 + 805 = 109480
Step 137: 109480 + 805 = 110285
Step 138: 110285 + 805 = 111090
Step 139: 111090 + 805 = 111895
Step 140: 111895 + 805 = 112700
Step 141: 112700 + 805 = 113505
Step 142: 113505 + 805 = 114310
Step 143: 114310 + 805 = 115115
Step 144: 115115 + 805 = 115920
Step 145: 115920 + 805 = 116725
Step 146: 116725 + 805 = 117530
Step 147: 117530 + 805 = 118335
Step 148: 118335 + 805 = 119140
Step 149: 119140 + 805 = 119945
Step 150: 119945 + 805 = 120750

So, 805*150 = 120750