Let's roll up our sleeves and solve this. We have 658 and we're going to multiply it by 7, essentially adding 658 to itself 7 times.
Step 1: 0 + 658 = 658
Step 2: 658 + 658 = 1316
Step 3: 1316 + 658 = 1974
Step 4: 1974 + 658 = 2632
Step 5: 2632 + 658 = 3290
Step 6: 3290 + 658 = 3948
Step 7: 3948 + 658 = 4606

So, 658*7 = 4606