Alright, let's work through 77799255 times 19495948 step by step
77799255 × 19495948 = 19495948 × (77799255)
+ 19495948 × 5 producing 97479740
+ 19495948 × 50 what gives us 974797400
+ 19495948 × 200 what gives us 3899189600
+ 19495948 × 9000 yielding 175463532000
+ 19495948 × 90000 yielding 1754635320000
+ 19495948 × 700000 resulting in 13647163600000
+ 19495948 × 7000000 resulting in 136471636000000
+ 19495948 × 70000000 yielding 1364716360000000

= 1516770229918740
