Alright, let's work through 78438895 times 61287306 step by step
78438895 × 61287306 = 61287306 × (78438895)
+ 61287306 × 5 which equals 306436530
+ 61287306 × 90 yielding 5515857540
+ 61287306 × 800 what gives us 49029844800
+ 61287306 × 8000 that results in 490298448000
+ 61287306 × 30000 producing 1838619180000
+ 61287306 × 400000 yielding 24514922400000
+ 61287306 × 8000000 that is equal 490298448000000
+ 61287306 × 70000000 that equals 4290111420000000

= 4807308560166870
