Let's get this math done. We have 880 and we're going to multiply it by 7. This is the same as taking 880 and adding it to itself 7 times.
Step 1: 0 + 880 = 880
Step 2: 880 + 880 = 1760
Step 3: 1760 + 880 = 2640
Step 4: 2640 + 880 = 3520
Step 5: 3520 + 880 = 4400
Step 6: 4400 + 880 = 5280
Step 7: 5280 + 880 = 6160

So, 880*7 = 6160