Alright, let's work through 78234008 times 27781648 step by step
78234008 × 27781648 = 27781648 × (78234008)
+ 27781648 × 8 what gives us 222253184
+ 27781648 × 00 yielding 0
+ 27781648 × 000 giving us 0
+ 27781648 × 4000 what gives us 111126592000
+ 27781648 × 30000 producing 833449440000
+ 27781648 × 200000 that results in 5556329600000
+ 27781648 × 8000000 giving us 222253184000000
+ 27781648 × 70000000 what gives us 1944715360000000

= 2173469671885184
