Alright, let's work through 25780434 times 79230433 step by step
25780434 × 79230433 = 79230433 × (25780434)
+ 79230433 × 4 what gives us 316921732
+ 79230433 × 30 what gives us 2376912990
+ 79230433 × 400 yielding 31692173200
+ 79230433 × 0000 that equals 0
+ 79230433 × 80000 resulting in 6338434640000
+ 79230433 × 700000 that equals 55461303100000
+ 79230433 × 5000000 resulting in 396152165000000
+ 79230433 × 20000000 producing 1584608660000000

= 2042594948747922
