OK, let's work through this together. We're starting with 960 and we're going to multiply it by 18, which means we add 960 to itself 18 times.
Step 1: 0 + 960 = 960
Step 2: 960 + 960 = 1920
Step 3: 1920 + 960 = 2880
Step 4: 2880 + 960 = 3840
Step 5: 3840 + 960 = 4800
Step 6: 4800 + 960 = 5760
Step 7: 5760 + 960 = 6720
Step 8: 6720 + 960 = 7680
Step 9: 7680 + 960 = 8640
Step 10: 8640 + 960 = 9600
Step 11: 9600 + 960 = 10560
Step 12: 10560 + 960 = 11520
Step 13: 11520 + 960 = 12480
Step 14: 12480 + 960 = 13440
Step 15: 13440 + 960 = 14400
Step 16: 14400 + 960 = 15360
Step 17: 15360 + 960 = 16320
Step 18: 16320 + 960 = 17280

So, 960*18 = 17280