Alright, let's solve this math problem step by step. First, we have the number 555. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 120. So, we're going to take the number 555 and add it to itself 120 times.
Step 1: 0 + 555 = 555
Step 2: 555 + 555 = 1110
Step 3: 1110 + 555 = 1665
Step 4: 1665 + 555 = 2220
Step 5: 2220 + 555 = 2775
Step 6: 2775 + 555 = 3330
Step 7: 3330 + 555 = 3885
Step 8: 3885 + 555 = 4440
Step 9: 4440 + 555 = 4995
Step 10: 4995 + 555 = 5550
Step 11: 5550 + 555 = 6105
Step 12: 6105 + 555 = 6660
Step 13: 6660 + 555 = 7215
Step 14: 7215 + 555 = 7770
Step 15: 7770 + 555 = 8325
Step 16: 8325 + 555 = 8880
Step 17: 8880 + 555 = 9435
Step 18: 9435 + 555 = 9990
Step 19: 9990 + 555 = 10545
Step 20: 10545 + 555 = 11100
Step 21: 11100 + 555 = 11655
Step 22: 11655 + 555 = 12210
Step 23: 12210 + 555 = 12765
Step 24: 12765 + 555 = 13320
Step 25: 13320 + 555 = 13875
Step 26: 13875 + 555 = 14430
Step 27: 14430 + 555 = 14985
Step 28: 14985 + 555 = 15540
Step 29: 15540 + 555 = 16095
Step 30: 16095 + 555 = 16650
Step 31: 16650 + 555 = 17205
Step 32: 17205 + 555 = 17760
Step 33: 17760 + 555 = 18315
Step 34: 18315 + 555 = 18870
Step 35: 18870 + 555 = 19425
Step 36: 19425 + 555 = 19980
Step 37: 19980 + 555 = 20535
Step 38: 20535 + 555 = 21090
Step 39: 21090 + 555 = 21645
Step 40: 21645 + 555 = 22200
Step 41: 22200 + 555 = 22755
Step 42: 22755 + 555 = 23310
Step 43: 23310 + 555 = 23865
Step 44: 23865 + 555 = 24420
Step 45: 24420 + 555 = 24975
Step 46: 24975 + 555 = 25530
Step 47: 25530 + 555 = 26085
Step 48: 26085 + 555 = 26640
Step 49: 26640 + 555 = 27195
Step 50: 27195 + 555 = 27750
Step 51: 27750 + 555 = 28305
Step 52: 28305 + 555 = 28860
Step 53: 28860 + 555 = 29415
Step 54: 29415 + 555 = 29970
Step 55: 29970 + 555 = 30525
Step 56: 30525 + 555 = 31080
Step 57: 31080 + 555 = 31635
Step 58: 31635 + 555 = 32190
Step 59: 32190 + 555 = 32745
Step 60: 32745 + 555 = 33300
Step 61: 33300 + 555 = 33855
Step 62: 33855 + 555 = 34410
Step 63: 34410 + 555 = 34965
Step 64: 34965 + 555 = 35520
Step 65: 35520 + 555 = 36075
Step 66: 36075 + 555 = 36630
Step 67: 36630 + 555 = 37185
Step 68: 37185 + 555 = 37740
Step 69: 37740 + 555 = 38295
Step 70: 38295 + 555 = 38850
Step 71: 38850 + 555 = 39405
Step 72: 39405 + 555 = 39960
Step 73: 39960 + 555 = 40515
Step 74: 40515 + 555 = 41070
Step 75: 41070 + 555 = 41625
Step 76: 41625 + 555 = 42180
Step 77: 42180 + 555 = 42735
Step 78: 42735 + 555 = 43290
Step 79: 43290 + 555 = 43845
Step 80: 43845 + 555 = 44400
Step 81: 44400 + 555 = 44955
Step 82: 44955 + 555 = 45510
Step 83: 45510 + 555 = 46065
Step 84: 46065 + 555 = 46620
Step 85: 46620 + 555 = 47175
Step 86: 47175 + 555 = 47730
Step 87: 47730 + 555 = 48285
Step 88: 48285 + 555 = 48840
Step 89: 48840 + 555 = 49395
Step 90: 49395 + 555 = 49950
Step 91: 49950 + 555 = 50505
Step 92: 50505 + 555 = 51060
Step 93: 51060 + 555 = 51615
Step 94: 51615 + 555 = 52170
Step 95: 52170 + 555 = 52725
Step 96: 52725 + 555 = 53280
Step 97: 53280 + 555 = 53835
Step 98: 53835 + 555 = 54390
Step 99: 54390 + 555 = 54945
Step 100: 54945 + 555 = 55500
Step 101: 55500 + 555 = 56055
Step 102: 56055 + 555 = 56610
Step 103: 56610 + 555 = 57165
Step 104: 57165 + 555 = 57720
Step 105: 57720 + 555 = 58275
Step 106: 58275 + 555 = 58830
Step 107: 58830 + 555 = 59385
Step 108: 59385 + 555 = 59940
Step 109: 59940 + 555 = 60495
Step 110: 60495 + 555 = 61050
Step 111: 61050 + 555 = 61605
Step 112: 61605 + 555 = 62160
Step 113: 62160 + 555 = 62715
Step 114: 62715 + 555 = 63270
Step 115: 63270 + 555 = 63825
Step 116: 63825 + 555 = 64380
Step 117: 64380 + 555 = 64935
Step 118: 64935 + 555 = 65490
Step 119: 65490 + 555 = 66045
Step 120: 66045 + 555 = 66600

So, 555*120 = 66600