Alright, let's work through 80722005 times 28785008 step by step
80722005 × 28785008 = 28785008 × (80722005)
+ 28785008 × 5 producing 143925040
+ 28785008 × 00 what gives us 0
+ 28785008 × 000 which equals 0
+ 28785008 × 2000 what gives us 57570016000
+ 28785008 × 20000 giving us 575700160000
+ 28785008 × 700000 yielding 20149505600000
+ 28785008 × 0000000 giving us 0
+ 28785008 × 80000000 that results in 2302800640000000

= 2323583559701040
