80 as a product of prime factors
808 x 102 x 4 x 5 x 22 x 2 x 2 x 2 x 5 <===
2 and 40 and then 8 and 5 to make 40, then 2 and 4 to make eight, then 2 and 2 to make 4. so it is written as ( 2X5X2X2X2 ) =80
