Alright, let's work through 77658746 times 21696808 step by step
77658746 × 21696808 = 21696808 × (77658746)
+ 21696808 × 6 what gives us 130180848
+ 21696808 × 40 that is equal 867872320
+ 21696808 × 700 what gives us 15187765600
+ 21696808 × 8000 that is equal 173574464000
+ 21696808 × 50000 which equals 1084840400000
+ 21696808 × 600000 producing 13018084800000
+ 21696808 × 7000000 that is equal 151877656000000
+ 21696808 × 70000000 that is equal 1518776560000000

= 1684946901482768
