Alright, let's work through 47779379 times 77775575 step by step
47779379 × 77775575 = 77775575 × (47779379)
+ 77775575 × 9 that is equal 699980175
+ 77775575 × 70 what gives us 5444290250
+ 77775575 × 300 yielding 23332672500
+ 77775575 × 9000 what gives us 699980175000
+ 77775575 × 70000 producing 5444290250000
+ 77775575 × 700000 resulting in 54442902500000
+ 77775575 × 7000000 resulting in 544429025000000
+ 77775575 × 40000000 which equals 3111023000000000

= 3716068674867925
