Let's roll up our sleeves and solve this. We have 280 and we're going to multiply it by 7, essentially adding 280 to itself 7 times.
Step 1: 0 + 280 = 280
Step 2: 280 + 280 = 560
Step 3: 560 + 280 = 840
Step 4: 840 + 280 = 1120
Step 5: 1120 + 280 = 1400
Step 6: 1400 + 280 = 1680
Step 7: 1680 + 280 = 1960

So, 280*7 = 1960