Alright, let's solve this math problem step by step. First, we have the number 120. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 86. So, we're going to take the number 120 and add it to itself 86 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
Step 58: 6840 + 120 = 6960
Step 59: 6960 + 120 = 7080
Step 60: 7080 + 120 = 7200
Step 61: 7200 + 120 = 7320
Step 62: 7320 + 120 = 7440
Step 63: 7440 + 120 = 7560
Step 64: 7560 + 120 = 7680
Step 65: 7680 + 120 = 7800
Step 66: 7800 + 120 = 7920
Step 67: 7920 + 120 = 8040
Step 68: 8040 + 120 = 8160
Step 69: 8160 + 120 = 8280
Step 70: 8280 + 120 = 8400
Step 71: 8400 + 120 = 8520
Step 72: 8520 + 120 = 8640
Step 73: 8640 + 120 = 8760
Step 74: 8760 + 120 = 8880
Step 75: 8880 + 120 = 9000
Step 76: 9000 + 120 = 9120
Step 77: 9120 + 120 = 9240
Step 78: 9240 + 120 = 9360
Step 79: 9360 + 120 = 9480
Step 80: 9480 + 120 = 9600
Step 81: 9600 + 120 = 9720
Step 82: 9720 + 120 = 9840
Step 83: 9840 + 120 = 9960
Step 84: 9960 + 120 = 10080
Step 85: 10080 + 120 = 10200
Step 86: 10200 + 120 = 10320

So, 120*86 = 10320