Alright, let's work through 77308859 times 77669778 step by step
77308859 × 77669778 = 77669778 × (77308859)
+ 77669778 × 9 yielding 699028002
+ 77669778 × 50 that is equal 3883488900
+ 77669778 × 800 that equals 62135822400
+ 77669778 × 8000 that results in 621358224000
+ 77669778 × 00000 which equals 0
+ 77669778 × 300000 producing 23300933400000
+ 77669778 × 7000000 that is equal 543688446000000
+ 77669778 × 70000000 that equals 5436884460000000

= 6004561915963302
