No problem, we've got 40418424 and 20423371 to multiply
40418424 × 20423371 = 20423371 × (40418424)
+ 20423371 × 4 that equals 81693484
+ 20423371 × 20 that results in 408467420
+ 20423371 × 400 producing 8169348400
+ 20423371 × 8000 which equals 163386968000
+ 20423371 × 10000 giving us 204233710000
+ 20423371 × 400000 that equals 8169348400000
+ 20423371 × 0000000 which equals 0
+ 20423371 × 40000000 resulting in 816934840000000

= 825480468587304
