Alright, let's work through 77877481 times 57687972 step by step
77877481 × 57687972 = 57687972 × (77877481)
+ 57687972 × 1 yielding 57687972
+ 57687972 × 80 that is equal 4615037760
+ 57687972 × 400 that is equal 23075188800
+ 57687972 × 7000 that equals 403815804000
+ 57687972 × 70000 yielding 4038158040000
+ 57687972 × 800000 what gives us 46150377600000
+ 57687972 × 7000000 producing 403815804000000
+ 57687972 × 70000000 resulting in 4038158040000000

= 4492593943358532
