Alright, let's work through 87347377 times 51058721 step by step
87347377 × 51058721 = 51058721 × (87347377)
+ 51058721 × 7 giving us 357411047
+ 51058721 × 70 which equals 3574110470
+ 51058721 × 300 giving us 15317616300
+ 51058721 × 7000 yielding 357411047000
+ 51058721 × 40000 resulting in 2042348840000
+ 51058721 × 300000 that results in 15317616300000
+ 51058721 × 7000000 which equals 357411047000000
+ 51058721 × 80000000 which equals 4084697680000000

= 4459845352324817
