Alright, let's work through 40713784 times 25656421 step by step
40713784 × 25656421 = 25656421 × (40713784)
+ 25656421 × 4 giving us 102625684
+ 25656421 × 80 that results in 2052513680
+ 25656421 × 700 which equals 17959494700
+ 25656421 × 3000 what gives us 76969263000
+ 25656421 × 10000 yielding 256564210000
+ 25656421 × 700000 that results in 17959494700000
+ 25656421 × 0000000 which equals 0
+ 25656421 × 40000000 resulting in 1026256840000000

= 1044569982807064
