Let's get this math done. We have 253 and we're going to multiply it by 7. This is the same as taking 253 and adding it to itself 7 times.
Step 1: 0 + 253 = 253
Step 2: 253 + 253 = 506
Step 3: 506 + 253 = 759
Step 4: 759 + 253 = 1012
Step 5: 1012 + 253 = 1265
Step 6: 1265 + 253 = 1518
Step 7: 1518 + 253 = 1771

So, 253*7 = 1771