OK, let's work through this together. We're starting with 360 and we're going to multiply it by 20, which means we add 360 to itself 20 times.
Step 1: 0 + 360 = 360
Step 2: 360 + 360 = 720
Step 3: 720 + 360 = 1080
Step 4: 1080 + 360 = 1440
Step 5: 1440 + 360 = 1800
Step 6: 1800 + 360 = 2160
Step 7: 2160 + 360 = 2520
Step 8: 2520 + 360 = 2880
Step 9: 2880 + 360 = 3240
Step 10: 3240 + 360 = 3600
Step 11: 3600 + 360 = 3960
Step 12: 3960 + 360 = 4320
Step 13: 4320 + 360 = 4680
Step 14: 4680 + 360 = 5040
Step 15: 5040 + 360 = 5400
Step 16: 5400 + 360 = 5760
Step 17: 5760 + 360 = 6120
Step 18: 6120 + 360 = 6480
Step 19: 6480 + 360 = 6840
Step 20: 6840 + 360 = 7200

So, 360*20 = 7200