Alright, let's work through 87702564 times 76071254 step by step
87702564 × 76071254 = 76071254 × (87702564)
+ 76071254 × 4 resulting in 304285016
+ 76071254 × 60 resulting in 4564275240
+ 76071254 × 500 which equals 38035627000
+ 76071254 × 2000 that results in 152142508000
+ 76071254 × 00000 that equals 0
+ 76071254 × 700000 resulting in 53249877800000
+ 76071254 × 7000000 producing 532498778000000
+ 76071254 × 80000000 resulting in 6085700320000000

= 6671644022495256
