No problem, we've got 40019812 and 9872056 to multiply
40019812 × 9872056 = 9872056 × (40019812)
+ 9872056 × 2 which equals 19744112
+ 9872056 × 10 that is equal 98720560
+ 9872056 × 800 that is equal 7897644800
+ 9872056 × 9000 producing 88848504000
+ 9872056 × 10000 resulting in 98720560000
+ 9872056 × 000000 that equals 0
+ 9872056 × 0000000 that is equal 0
+ 9872056 × 40000000 that results in 394882240000000

= 395077825173472
