Alright, let's work through 77377909 times 77306355 step by step
77377909 × 77306355 = 77306355 × (77377909)
+ 77306355 × 9 yielding 695757195
+ 77306355 × 00 which equals 0
+ 77306355 × 900 resulting in 69575719500
+ 77306355 × 7000 that equals 541144485000
+ 77306355 × 70000 that is equal 5411444850000
+ 77306355 × 300000 giving us 23191906500000
+ 77306355 × 7000000 giving us 541144485000000
+ 77306355 × 70000000 that is equal 5411444850000000

= 5981804102311695
