Alright, let's work through 89660403 times 38639501 step by step
89660403 × 38639501 = 38639501 × (89660403)
+ 38639501 × 3 what gives us 115918503
+ 38639501 × 00 resulting in 0
+ 38639501 × 400 that equals 15455800400
+ 38639501 × 0000 resulting in 0
+ 38639501 × 60000 producing 2318370060000
+ 38639501 × 600000 yielding 23183700600000
+ 38639501 × 9000000 yielding 347755509000000
+ 38639501 × 80000000 giving us 3091160080000000

= 3464433231378903
