Alright, let's work through 77687339 times 77357380 step by step
77687339 × 77357380 = 77357380 × (77687339)
+ 77357380 × 9 that results in 696216420
+ 77357380 × 30 that is equal 2320721400
+ 77357380 × 300 that equals 23207214000
+ 77357380 × 7000 what gives us 541501660000
+ 77357380 × 80000 yielding 6188590400000
+ 77357380 × 600000 that results in 46414428000000
+ 77357380 × 7000000 that is equal 541501660000000
+ 77357380 × 70000000 resulting in 5415016600000000

= 6009689004211820
