No problem, we've got 87891565 and 44368916 to multiply
87891565 × 44368916 = 44368916 × (87891565)
+ 44368916 × 5 producing 221844580
+ 44368916 × 60 producing 2662134960
+ 44368916 × 500 what gives us 22184458000
+ 44368916 × 1000 which equals 44368916000
+ 44368916 × 90000 producing 3993202440000
+ 44368916 × 800000 yielding 35495132800000
+ 44368916 × 7000000 producing 310582412000000
+ 44368916 × 80000000 that equals 3549513280000000

= 3899653464593540
