Alright, let's work through 80299647 times 40240542 step by step
80299647 × 40240542 = 40240542 × (80299647)
+ 40240542 × 7 which equals 281683794
+ 40240542 × 40 that results in 1609621680
+ 40240542 × 600 that is equal 24144325200
+ 40240542 × 9000 yielding 362164878000
+ 40240542 × 90000 that is equal 3621648780000
+ 40240542 × 200000 resulting in 8048108400000
+ 40240542 × 0000000 that results in 0
+ 40240542 × 80000000 what gives us 3219243360000000

= 3231301317688674
