Sure thing, let's get straight to it. We start with 510 and we're going to multiply it by 158, which means adding 510 to itself 158 times.
Step 1: 0 + 510 = 510
Step 2: 510 + 510 = 1020
Step 3: 1020 + 510 = 1530
Step 4: 1530 + 510 = 2040
Step 5: 2040 + 510 = 2550
Step 6: 2550 + 510 = 3060
Step 7: 3060 + 510 = 3570
Step 8: 3570 + 510 = 4080
Step 9: 4080 + 510 = 4590
Step 10: 4590 + 510 = 5100
Step 11: 5100 + 510 = 5610
Step 12: 5610 + 510 = 6120
Step 13: 6120 + 510 = 6630
Step 14: 6630 + 510 = 7140
Step 15: 7140 + 510 = 7650
Step 16: 7650 + 510 = 8160
Step 17: 8160 + 510 = 8670
Step 18: 8670 + 510 = 9180
Step 19: 9180 + 510 = 9690
Step 20: 9690 + 510 = 10200
Step 21: 10200 + 510 = 10710
Step 22: 10710 + 510 = 11220
Step 23: 11220 + 510 = 11730
Step 24: 11730 + 510 = 12240
Step 25: 12240 + 510 = 12750
Step 26: 12750 + 510 = 13260
Step 27: 13260 + 510 = 13770
Step 28: 13770 + 510 = 14280
Step 29: 14280 + 510 = 14790
Step 30: 14790 + 510 = 15300
Step 31: 15300 + 510 = 15810
Step 32: 15810 + 510 = 16320
Step 33: 16320 + 510 = 16830
Step 34: 16830 + 510 = 17340
Step 35: 17340 + 510 = 17850
Step 36: 17850 + 510 = 18360
Step 37: 18360 + 510 = 18870
Step 38: 18870 + 510 = 19380
Step 39: 19380 + 510 = 19890
Step 40: 19890 + 510 = 20400
Step 41: 20400 + 510 = 20910
Step 42: 20910 + 510 = 21420
Step 43: 21420 + 510 = 21930
Step 44: 21930 + 510 = 22440
Step 45: 22440 + 510 = 22950
Step 46: 22950 + 510 = 23460
Step 47: 23460 + 510 = 23970
Step 48: 23970 + 510 = 24480
Step 49: 24480 + 510 = 24990
Step 50: 24990 + 510 = 25500
Step 51: 25500 + 510 = 26010
Step 52: 26010 + 510 = 26520
Step 53: 26520 + 510 = 27030
Step 54: 27030 + 510 = 27540
Step 55: 27540 + 510 = 28050
Step 56: 28050 + 510 = 28560
Step 57: 28560 + 510 = 29070
Step 58: 29070 + 510 = 29580
Step 59: 29580 + 510 = 30090
Step 60: 30090 + 510 = 30600
Step 61: 30600 + 510 = 31110
Step 62: 31110 + 510 = 31620
Step 63: 31620 + 510 = 32130
Step 64: 32130 + 510 = 32640
Step 65: 32640 + 510 = 33150
Step 66: 33150 + 510 = 33660
Step 67: 33660 + 510 = 34170
Step 68: 34170 + 510 = 34680
Step 69: 34680 + 510 = 35190
Step 70: 35190 + 510 = 35700
Step 71: 35700 + 510 = 36210
Step 72: 36210 + 510 = 36720
Step 73: 36720 + 510 = 37230
Step 74: 37230 + 510 = 37740
Step 75: 37740 + 510 = 38250
Step 76: 38250 + 510 = 38760
Step 77: 38760 + 510 = 39270
Step 78: 39270 + 510 = 39780
Step 79: 39780 + 510 = 40290
Step 80: 40290 + 510 = 40800
Step 81: 40800 + 510 = 41310
Step 82: 41310 + 510 = 41820
Step 83: 41820 + 510 = 42330
Step 84: 42330 + 510 = 42840
Step 85: 42840 + 510 = 43350
Step 86: 43350 + 510 = 43860
Step 87: 43860 + 510 = 44370
Step 88: 44370 + 510 = 44880
Step 89: 44880 + 510 = 45390
Step 90: 45390 + 510 = 45900
Step 91: 45900 + 510 = 46410
Step 92: 46410 + 510 = 46920
Step 93: 46920 + 510 = 47430
Step 94: 47430 + 510 = 47940
Step 95: 47940 + 510 = 48450
Step 96: 48450 + 510 = 48960
Step 97: 48960 + 510 = 49470
Step 98: 49470 + 510 = 49980
Step 99: 49980 + 510 = 50490
Step 100: 50490 + 510 = 51000
Step 101: 51000 + 510 = 51510
Step 102: 51510 + 510 = 52020
Step 103: 52020 + 510 = 52530
Step 104: 52530 + 510 = 53040
Step 105: 53040 + 510 = 53550
Step 106: 53550 + 510 = 54060
Step 107: 54060 + 510 = 54570
Step 108: 54570 + 510 = 55080
Step 109: 55080 + 510 = 55590
Step 110: 55590 + 510 = 56100
Step 111: 56100 + 510 = 56610
Step 112: 56610 + 510 = 57120
Step 113: 57120 + 510 = 57630
Step 114: 57630 + 510 = 58140
Step 115: 58140 + 510 = 58650
Step 116: 58650 + 510 = 59160
Step 117: 59160 + 510 = 59670
Step 118: 59670 + 510 = 60180
Step 119: 60180 + 510 = 60690
Step 120: 60690 + 510 = 61200
Step 121: 61200 + 510 = 61710
Step 122: 61710 + 510 = 62220
Step 123: 62220 + 510 = 62730
Step 124: 62730 + 510 = 63240
Step 125: 63240 + 510 = 63750
Step 126: 63750 + 510 = 64260
Step 127: 64260 + 510 = 64770
Step 128: 64770 + 510 = 65280
Step 129: 65280 + 510 = 65790
Step 130: 65790 + 510 = 66300
Step 131: 66300 + 510 = 66810
Step 132: 66810 + 510 = 67320
Step 133: 67320 + 510 = 67830
Step 134: 67830 + 510 = 68340
Step 135: 68340 + 510 = 68850
Step 136: 68850 + 510 = 69360
Step 137: 69360 + 510 = 69870
Step 138: 69870 + 510 = 70380
Step 139: 70380 + 510 = 70890
Step 140: 70890 + 510 = 71400
Step 141: 71400 + 510 = 71910
Step 142: 71910 + 510 = 72420
Step 143: 72420 + 510 = 72930
Step 144: 72930 + 510 = 73440
Step 145: 73440 + 510 = 73950
Step 146: 73950 + 510 = 74460
Step 147: 74460 + 510 = 74970
Step 148: 74970 + 510 = 75480
Step 149: 75480 + 510 = 75990
Step 150: 75990 + 510 = 76500
Step 151: 76500 + 510 = 77010
Step 152: 77010 + 510 = 77520
Step 153: 77520 + 510 = 78030
Step 154: 78030 + 510 = 78540
Step 155: 78540 + 510 = 79050
Step 156: 79050 + 510 = 79560
Step 157: 79560 + 510 = 80070
Step 158: 80070 + 510 = 80580

So, 510*158 = 80580