We're going to solve 7803 multiplied by 5520
7803 × 5520 = 5520 × (7803)
+ 5520 × 3 producing 16560
+ 5520 × 00 giving us 0
+ 5520 × 800 producing 4416000
+ 5520 × 7000 what gives us 38640000

= 43072560
