Sure thing, let's get straight to it. We start with 620 and we're going to multiply it by 181, which means adding 620 to itself 181 times.
Step 1: 0 + 620 = 620
Step 2: 620 + 620 = 1240
Step 3: 1240 + 620 = 1860
Step 4: 1860 + 620 = 2480
Step 5: 2480 + 620 = 3100
Step 6: 3100 + 620 = 3720
Step 7: 3720 + 620 = 4340
Step 8: 4340 + 620 = 4960
Step 9: 4960 + 620 = 5580
Step 10: 5580 + 620 = 6200
Step 11: 6200 + 620 = 6820
Step 12: 6820 + 620 = 7440
Step 13: 7440 + 620 = 8060
Step 14: 8060 + 620 = 8680
Step 15: 8680 + 620 = 9300
Step 16: 9300 + 620 = 9920
Step 17: 9920 + 620 = 10540
Step 18: 10540 + 620 = 11160
Step 19: 11160 + 620 = 11780
Step 20: 11780 + 620 = 12400
Step 21: 12400 + 620 = 13020
Step 22: 13020 + 620 = 13640
Step 23: 13640 + 620 = 14260
Step 24: 14260 + 620 = 14880
Step 25: 14880 + 620 = 15500
Step 26: 15500 + 620 = 16120
Step 27: 16120 + 620 = 16740
Step 28: 16740 + 620 = 17360
Step 29: 17360 + 620 = 17980
Step 30: 17980 + 620 = 18600
Step 31: 18600 + 620 = 19220
Step 32: 19220 + 620 = 19840
Step 33: 19840 + 620 = 20460
Step 34: 20460 + 620 = 21080
Step 35: 21080 + 620 = 21700
Step 36: 21700 + 620 = 22320
Step 37: 22320 + 620 = 22940
Step 38: 22940 + 620 = 23560
Step 39: 23560 + 620 = 24180
Step 40: 24180 + 620 = 24800
Step 41: 24800 + 620 = 25420
Step 42: 25420 + 620 = 26040
Step 43: 26040 + 620 = 26660
Step 44: 26660 + 620 = 27280
Step 45: 27280 + 620 = 27900
Step 46: 27900 + 620 = 28520
Step 47: 28520 + 620 = 29140
Step 48: 29140 + 620 = 29760
Step 49: 29760 + 620 = 30380
Step 50: 30380 + 620 = 31000
Step 51: 31000 + 620 = 31620
Step 52: 31620 + 620 = 32240
Step 53: 32240 + 620 = 32860
Step 54: 32860 + 620 = 33480
Step 55: 33480 + 620 = 34100
Step 56: 34100 + 620 = 34720
Step 57: 34720 + 620 = 35340
Step 58: 35340 + 620 = 35960
Step 59: 35960 + 620 = 36580
Step 60: 36580 + 620 = 37200
Step 61: 37200 + 620 = 37820
Step 62: 37820 + 620 = 38440
Step 63: 38440 + 620 = 39060
Step 64: 39060 + 620 = 39680
Step 65: 39680 + 620 = 40300
Step 66: 40300 + 620 = 40920
Step 67: 40920 + 620 = 41540
Step 68: 41540 + 620 = 42160
Step 69: 42160 + 620 = 42780
Step 70: 42780 + 620 = 43400
Step 71: 43400 + 620 = 44020
Step 72: 44020 + 620 = 44640
Step 73: 44640 + 620 = 45260
Step 74: 45260 + 620 = 45880
Step 75: 45880 + 620 = 46500
Step 76: 46500 + 620 = 47120
Step 77: 47120 + 620 = 47740
Step 78: 47740 + 620 = 48360
Step 79: 48360 + 620 = 48980
Step 80: 48980 + 620 = 49600
Step 81: 49600 + 620 = 50220
Step 82: 50220 + 620 = 50840
Step 83: 50840 + 620 = 51460
Step 84: 51460 + 620 = 52080
Step 85: 52080 + 620 = 52700
Step 86: 52700 + 620 = 53320
Step 87: 53320 + 620 = 53940
Step 88: 53940 + 620 = 54560
Step 89: 54560 + 620 = 55180
Step 90: 55180 + 620 = 55800
Step 91: 55800 + 620 = 56420
Step 92: 56420 + 620 = 57040
Step 93: 57040 + 620 = 57660
Step 94: 57660 + 620 = 58280
Step 95: 58280 + 620 = 58900
Step 96: 58900 + 620 = 59520
Step 97: 59520 + 620 = 60140
Step 98: 60140 + 620 = 60760
Step 99: 60760 + 620 = 61380
Step 100: 61380 + 620 = 62000
Step 101: 62000 + 620 = 62620
Step 102: 62620 + 620 = 63240
Step 103: 63240 + 620 = 63860
Step 104: 63860 + 620 = 64480
Step 105: 64480 + 620 = 65100
Step 106: 65100 + 620 = 65720
Step 107: 65720 + 620 = 66340
Step 108: 66340 + 620 = 66960
Step 109: 66960 + 620 = 67580
Step 110: 67580 + 620 = 68200
Step 111: 68200 + 620 = 68820
Step 112: 68820 + 620 = 69440
Step 113: 69440 + 620 = 70060
Step 114: 70060 + 620 = 70680
Step 115: 70680 + 620 = 71300
Step 116: 71300 + 620 = 71920
Step 117: 71920 + 620 = 72540
Step 118: 72540 + 620 = 73160
Step 119: 73160 + 620 = 73780
Step 120: 73780 + 620 = 74400
Step 121: 74400 + 620 = 75020
Step 122: 75020 + 620 = 75640
Step 123: 75640 + 620 = 76260
Step 124: 76260 + 620 = 76880
Step 125: 76880 + 620 = 77500
Step 126: 77500 + 620 = 78120
Step 127: 78120 + 620 = 78740
Step 128: 78740 + 620 = 79360
Step 129: 79360 + 620 = 79980
Step 130: 79980 + 620 = 80600
Step 131: 80600 + 620 = 81220
Step 132: 81220 + 620 = 81840
Step 133: 81840 + 620 = 82460
Step 134: 82460 + 620 = 83080
Step 135: 83080 + 620 = 83700
Step 136: 83700 + 620 = 84320
Step 137: 84320 + 620 = 84940
Step 138: 84940 + 620 = 85560
Step 139: 85560 + 620 = 86180
Step 140: 86180 + 620 = 86800
Step 141: 86800 + 620 = 87420
Step 142: 87420 + 620 = 88040
Step 143: 88040 + 620 = 88660
Step 144: 88660 + 620 = 89280
Step 145: 89280 + 620 = 89900
Step 146: 89900 + 620 = 90520
Step 147: 90520 + 620 = 91140
Step 148: 91140 + 620 = 91760
Step 149: 91760 + 620 = 92380
Step 150: 92380 + 620 = 93000
Step 151: 93000 + 620 = 93620
Step 152: 93620 + 620 = 94240
Step 153: 94240 + 620 = 94860
Step 154: 94860 + 620 = 95480
Step 155: 95480 + 620 = 96100
Step 156: 96100 + 620 = 96720
Step 157: 96720 + 620 = 97340
Step 158: 97340 + 620 = 97960
Step 159: 97960 + 620 = 98580
Step 160: 98580 + 620 = 99200
Step 161: 99200 + 620 = 99820
Step 162: 99820 + 620 = 100440
Step 163: 100440 + 620 = 101060
Step 164: 101060 + 620 = 101680
Step 165: 101680 + 620 = 102300
Step 166: 102300 + 620 = 102920
Step 167: 102920 + 620 = 103540
Step 168: 103540 + 620 = 104160
Step 169: 104160 + 620 = 104780
Step 170: 104780 + 620 = 105400
Step 171: 105400 + 620 = 106020
Step 172: 106020 + 620 = 106640
Step 173: 106640 + 620 = 107260
Step 174: 107260 + 620 = 107880
Step 175: 107880 + 620 = 108500
Step 176: 108500 + 620 = 109120
Step 177: 109120 + 620 = 109740
Step 178: 109740 + 620 = 110360
Step 179: 110360 + 620 = 110980
Step 180: 110980 + 620 = 111600
Step 181: 111600 + 620 = 112220

So, 620*181 = 112220