Let's roll up our sleeves and solve this. We have 165 and we're going to multiply it by 7, essentially adding 165 to itself 7 times.
Step 1: 0 + 165 = 165
Step 2: 165 + 165 = 330
Step 3: 330 + 165 = 495
Step 4: 495 + 165 = 660
Step 5: 660 + 165 = 825
Step 6: 825 + 165 = 990
Step 7: 990 + 165 = 1155

So, 165*7 = 1155