Alright, let's work through 39687448 times 80472678 step by step
39687448 × 80472678 = 80472678 × (39687448)
+ 80472678 × 8 producing 643781424
+ 80472678 × 40 what gives us 3218907120
+ 80472678 × 400 that is equal 32189071200
+ 80472678 × 7000 yielding 563308746000
+ 80472678 × 80000 which equals 6437814240000
+ 80472678 × 600000 that results in 48283606800000
+ 80472678 × 9000000 what gives us 724254102000000
+ 80472678 × 30000000 resulting in 2414180340000000

= 3193755223545744
