Alright, let's work through 39930210 times 89891899 step by step
39930210 × 89891899 = 89891899 × (39930210)
+ 89891899 × 0 what gives us 0
+ 89891899 × 10 that is equal 898918990
+ 89891899 × 200 resulting in 17978379800
+ 89891899 × 0000 producing 0
+ 89891899 × 30000 that results in 2696756970000
+ 89891899 × 900000 yielding 80902709100000
+ 89891899 × 9000000 giving us 809027091000000
+ 89891899 × 30000000 yielding 2696756970000000

= 3589402404368790
