OK, let's work through this together. We're starting with 757 and we're going to multiply it by 6, which means we add 757 to itself 6 times.
Step 1: 0 + 757 = 757
Step 2: 757 + 757 = 1514
Step 3: 1514 + 757 = 2271
Step 4: 2271 + 757 = 3028
Step 5: 3028 + 757 = 3785
Step 6: 3785 + 757 = 4542

So, 757*6 = 4542