Alright, let's work through 39887989 times 87734152 step by step
39887989 × 87734152 = 87734152 × (39887989)
+ 87734152 × 9 yielding 789607368
+ 87734152 × 80 that equals 7018732160
+ 87734152 × 900 producing 78960736800
+ 87734152 × 7000 giving us 614139064000
+ 87734152 × 80000 yielding 7018732160000
+ 87734152 × 800000 what gives us 70187321600000
+ 87734152 × 9000000 yielding 789607368000000
+ 87734152 × 30000000 that is equal 2632024560000000

= 3499538889900328
