OK, let's work through this together. We're starting with 960 and we're going to multiply it by 3, which means we add 960 to itself 3 times.
Step 1: 0 + 960 = 960
Step 2: 960 + 960 = 1920
Step 3: 1920 + 960 = 2880

So, 960*3 = 2880