Let's roll up our sleeves and solve this. We have 224 and we're going to multiply it by 7, essentially adding 224 to itself 7 times.
Step 1: 0 + 224 = 224
Step 2: 224 + 224 = 448
Step 3: 448 + 224 = 672
Step 4: 672 + 224 = 896
Step 5: 896 + 224 = 1120
Step 6: 1120 + 224 = 1344
Step 7: 1344 + 224 = 1568

So, 224*7 = 1568