Answer:
1,280
Explanation:
I'm going to calculate 80 x 16 obsessively by timesing.
Calculations
 8 0
 1 6
____
4 8 0
8 0 0
 For the second row the first number will always be a zero because that is part of the rule.
Next we will add 800 + 480
 8 0 0
 4 8 0
______ 
 1, 2 8 0
And there is your answer
Hope this helps have a great day:)