OK, let's work through this together. We're starting with 435 and we're going to multiply it by 4, which means we add 435 to itself 4 times.
Step 1: 0 + 435 = 435
Step 2: 435 + 435 = 870
Step 3: 870 + 435 = 1305
Step 4: 1305 + 435 = 1740

So, 435*4 = 1740