Alright, let's work through 39761641 times 39684959 step by step
39761641 × 39684959 = 39684959 × (39761641)
+ 39684959 × 1 which equals 39684959
+ 39684959 × 40 resulting in 1587398360
+ 39684959 × 600 giving us 23810975400
+ 39684959 × 1000 which equals 39684959000
+ 39684959 × 60000 that results in 2381097540000
+ 39684959 × 700000 that results in 27779471300000
+ 39684959 × 9000000 that is equal 357164631000000
+ 39684959 × 30000000 yielding 1190548770000000

= 1577939092857719
