Alright, let's work through 42539807 times 86575856 step by step
42539807 × 86575856 = 86575856 × (42539807)
+ 86575856 × 7 that is equal 606030992
+ 86575856 × 00 what gives us 0
+ 86575856 × 800 what gives us 69260684800
+ 86575856 × 9000 resulting in 779182704000
+ 86575856 × 30000 that equals 2597275680000
+ 86575856 × 500000 that results in 43287928000000
+ 86575856 × 2000000 that equals 173151712000000
+ 86575856 × 40000000 resulting in 3463034240000000

= 3682920205099792
