Alright, let's work through 77360947 times 52909713 step by step
77360947 × 52909713 = 52909713 × (77360947)
+ 52909713 × 7 producing 370367991
+ 52909713 × 40 that is equal 2116388520
+ 52909713 × 900 that is equal 47618741700
+ 52909713 × 0000 what gives us 0
+ 52909713 × 60000 yielding 3174582780000
+ 52909713 × 300000 that results in 15872913900000
+ 52909713 × 7000000 which equals 370367991000000
+ 52909713 × 70000000 resulting in 3703679910000000

= 4093145503178211
