OK, let's work through this together. We're starting with 724 and we're going to multiply it by 7, which means we add 724 to itself 7 times.
Step 1: 0 + 724 = 724
Step 2: 724 + 724 = 1448
Step 3: 1448 + 724 = 2172
Step 4: 2172 + 724 = 2896
Step 5: 2896 + 724 = 3620
Step 6: 3620 + 724 = 4344
Step 7: 4344 + 724 = 5068

So, 724*7 = 5068