Alright, let's work through 40799968 times 63789425 step by step
40799968 × 63789425 = 63789425 × (40799968)
+ 63789425 × 8 that results in 510315400
+ 63789425 × 60 that is equal 3827365500
+ 63789425 × 900 which equals 57410482500
+ 63789425 × 9000 giving us 574104825000
+ 63789425 × 90000 that is equal 5741048250000
+ 63789425 × 700000 that equals 44652597500000
+ 63789425 × 0000000 yielding 0
+ 63789425 × 40000000 that results in 2551577000000000

= 2602606498738400
