Alright, let's work through 78823120 times 10725142 step by step
78823120 × 10725142 = 10725142 × (78823120)
+ 10725142 × 0 what gives us 0
+ 10725142 × 20 that results in 214502840
+ 10725142 × 100 producing 1072514200
+ 10725142 × 3000 that results in 32175426000
+ 10725142 × 20000 yielding 214502840000
+ 10725142 × 800000 yielding 8580113600000
+ 10725142 × 8000000 that results in 85801136000000
+ 10725142 × 70000000 that is equal 750759940000000

= 845389154883040
