OK, let's work through this together. We're starting with 216 and we're going to multiply it by 120, which means we add 216 to itself 120 times.
Step 1: 0 + 216 = 216
Step 2: 216 + 216 = 432
Step 3: 432 + 216 = 648
Step 4: 648 + 216 = 864
Step 5: 864 + 216 = 1080
Step 6: 1080 + 216 = 1296
Step 7: 1296 + 216 = 1512
Step 8: 1512 + 216 = 1728
Step 9: 1728 + 216 = 1944
Step 10: 1944 + 216 = 2160
Step 11: 2160 + 216 = 2376
Step 12: 2376 + 216 = 2592
Step 13: 2592 + 216 = 2808
Step 14: 2808 + 216 = 3024
Step 15: 3024 + 216 = 3240
Step 16: 3240 + 216 = 3456
Step 17: 3456 + 216 = 3672
Step 18: 3672 + 216 = 3888
Step 19: 3888 + 216 = 4104
Step 20: 4104 + 216 = 4320
Step 21: 4320 + 216 = 4536
Step 22: 4536 + 216 = 4752
Step 23: 4752 + 216 = 4968
Step 24: 4968 + 216 = 5184
Step 25: 5184 + 216 = 5400
Step 26: 5400 + 216 = 5616
Step 27: 5616 + 216 = 5832
Step 28: 5832 + 216 = 6048
Step 29: 6048 + 216 = 6264
Step 30: 6264 + 216 = 6480
Step 31: 6480 + 216 = 6696
Step 32: 6696 + 216 = 6912
Step 33: 6912 + 216 = 7128
Step 34: 7128 + 216 = 7344
Step 35: 7344 + 216 = 7560
Step 36: 7560 + 216 = 7776
Step 37: 7776 + 216 = 7992
Step 38: 7992 + 216 = 8208
Step 39: 8208 + 216 = 8424
Step 40: 8424 + 216 = 8640
Step 41: 8640 + 216 = 8856
Step 42: 8856 + 216 = 9072
Step 43: 9072 + 216 = 9288
Step 44: 9288 + 216 = 9504
Step 45: 9504 + 216 = 9720
Step 46: 9720 + 216 = 9936
Step 47: 9936 + 216 = 10152
Step 48: 10152 + 216 = 10368
Step 49: 10368 + 216 = 10584
Step 50: 10584 + 216 = 10800
Step 51: 10800 + 216 = 11016
Step 52: 11016 + 216 = 11232
Step 53: 11232 + 216 = 11448
Step 54: 11448 + 216 = 11664
Step 55: 11664 + 216 = 11880
Step 56: 11880 + 216 = 12096
Step 57: 12096 + 216 = 12312
Step 58: 12312 + 216 = 12528
Step 59: 12528 + 216 = 12744
Step 60: 12744 + 216 = 12960
Step 61: 12960 + 216 = 13176
Step 62: 13176 + 216 = 13392
Step 63: 13392 + 216 = 13608
Step 64: 13608 + 216 = 13824
Step 65: 13824 + 216 = 14040
Step 66: 14040 + 216 = 14256
Step 67: 14256 + 216 = 14472
Step 68: 14472 + 216 = 14688
Step 69: 14688 + 216 = 14904
Step 70: 14904 + 216 = 15120
Step 71: 15120 + 216 = 15336
Step 72: 15336 + 216 = 15552
Step 73: 15552 + 216 = 15768
Step 74: 15768 + 216 = 15984
Step 75: 15984 + 216 = 16200
Step 76: 16200 + 216 = 16416
Step 77: 16416 + 216 = 16632
Step 78: 16632 + 216 = 16848
Step 79: 16848 + 216 = 17064
Step 80: 17064 + 216 = 17280
Step 81: 17280 + 216 = 17496
Step 82: 17496 + 216 = 17712
Step 83: 17712 + 216 = 17928
Step 84: 17928 + 216 = 18144
Step 85: 18144 + 216 = 18360
Step 86: 18360 + 216 = 18576
Step 87: 18576 + 216 = 18792
Step 88: 18792 + 216 = 19008
Step 89: 19008 + 216 = 19224
Step 90: 19224 + 216 = 19440
Step 91: 19440 + 216 = 19656
Step 92: 19656 + 216 = 19872
Step 93: 19872 + 216 = 20088
Step 94: 20088 + 216 = 20304
Step 95: 20304 + 216 = 20520
Step 96: 20520 + 216 = 20736
Step 97: 20736 + 216 = 20952
Step 98: 20952 + 216 = 21168
Step 99: 21168 + 216 = 21384
Step 100: 21384 + 216 = 21600
Step 101: 21600 + 216 = 21816
Step 102: 21816 + 216 = 22032
Step 103: 22032 + 216 = 22248
Step 104: 22248 + 216 = 22464
Step 105: 22464 + 216 = 22680
Step 106: 22680 + 216 = 22896
Step 107: 22896 + 216 = 23112
Step 108: 23112 + 216 = 23328
Step 109: 23328 + 216 = 23544
Step 110: 23544 + 216 = 23760
Step 111: 23760 + 216 = 23976
Step 112: 23976 + 216 = 24192
Step 113: 24192 + 216 = 24408
Step 114: 24408 + 216 = 24624
Step 115: 24624 + 216 = 24840
Step 116: 24840 + 216 = 25056
Step 117: 25056 + 216 = 25272
Step 118: 25272 + 216 = 25488
Step 119: 25488 + 216 = 25704
Step 120: 25704 + 216 = 25920

So, 216*120 = 25920