Let's get this math done. We have 120 and we're going to multiply it by 57. This is the same as taking 120 and adding it to itself 57 times.
Step 1: 0 + 120 = 120
Step 2: 120 + 120 = 240
Step 3: 240 + 120 = 360
Step 4: 360 + 120 = 480
Step 5: 480 + 120 = 600
Step 6: 600 + 120 = 720
Step 7: 720 + 120 = 840
Step 8: 840 + 120 = 960
Step 9: 960 + 120 = 1080
Step 10: 1080 + 120 = 1200
Step 11: 1200 + 120 = 1320
Step 12: 1320 + 120 = 1440
Step 13: 1440 + 120 = 1560
Step 14: 1560 + 120 = 1680
Step 15: 1680 + 120 = 1800
Step 16: 1800 + 120 = 1920
Step 17: 1920 + 120 = 2040
Step 18: 2040 + 120 = 2160
Step 19: 2160 + 120 = 2280
Step 20: 2280 + 120 = 2400
Step 21: 2400 + 120 = 2520
Step 22: 2520 + 120 = 2640
Step 23: 2640 + 120 = 2760
Step 24: 2760 + 120 = 2880
Step 25: 2880 + 120 = 3000
Step 26: 3000 + 120 = 3120
Step 27: 3120 + 120 = 3240
Step 28: 3240 + 120 = 3360
Step 29: 3360 + 120 = 3480
Step 30: 3480 + 120 = 3600
Step 31: 3600 + 120 = 3720
Step 32: 3720 + 120 = 3840
Step 33: 3840 + 120 = 3960
Step 34: 3960 + 120 = 4080
Step 35: 4080 + 120 = 4200
Step 36: 4200 + 120 = 4320
Step 37: 4320 + 120 = 4440
Step 38: 4440 + 120 = 4560
Step 39: 4560 + 120 = 4680
Step 40: 4680 + 120 = 4800
Step 41: 4800 + 120 = 4920
Step 42: 4920 + 120 = 5040
Step 43: 5040 + 120 = 5160
Step 44: 5160 + 120 = 5280
Step 45: 5280 + 120 = 5400
Step 46: 5400 + 120 = 5520
Step 47: 5520 + 120 = 5640
Step 48: 5640 + 120 = 5760
Step 49: 5760 + 120 = 5880
Step 50: 5880 + 120 = 6000
Step 51: 6000 + 120 = 6120
Step 52: 6120 + 120 = 6240
Step 53: 6240 + 120 = 6360
Step 54: 6360 + 120 = 6480
Step 55: 6480 + 120 = 6600
Step 56: 6600 + 120 = 6720
Step 57: 6720 + 120 = 6840

So, 120*57 = 6840