Alright, let's work through 77008080 times 40356188 step by step
77008080 × 40356188 = 40356188 × (77008080)
+ 40356188 × 0 which equals 0
+ 40356188 × 80 that is equal 3228495040
+ 40356188 × 000 that is equal 0
+ 40356188 × 8000 that equals 322849504000
+ 40356188 × 00000 what gives us 0
+ 40356188 × 000000 that is equal 0
+ 40356188 × 7000000 that results in 282493316000000
+ 40356188 × 70000000 that is equal 2824933160000000

= 3107752553999040
