Alright, let's work through 87279077 times 51983819 step by step
87279077 × 51983819 = 51983819 × (87279077)
+ 51983819 × 7 producing 363886733
+ 51983819 × 70 producing 3638867330
+ 51983819 × 000 that results in 0
+ 51983819 × 9000 giving us 467854371000
+ 51983819 × 70000 giving us 3638867330000
+ 51983819 × 200000 that is equal 10396763800000
+ 51983819 × 7000000 yielding 363886733000000
+ 51983819 × 80000000 yielding 4158705520000000

= 4537099741255063
