OK, let's work through this together. We're starting with 460 and we're going to multiply it by 4, which means we add 460 to itself 4 times.
Step 1: 0 + 460 = 460
Step 2: 460 + 460 = 920
Step 3: 920 + 460 = 1380
Step 4: 1380 + 460 = 1840

So, 460*4 = 1840