Alright, let's work through 25700431 times 82025540 step by step
25700431 × 82025540 = 82025540 × (25700431)
+ 82025540 × 1 yielding 82025540
+ 82025540 × 30 what gives us 2460766200
+ 82025540 × 400 that results in 32810216000
+ 82025540 × 0000 yielding 0
+ 82025540 × 00000 which equals 0
+ 82025540 × 700000 what gives us 57417878000000
+ 82025540 × 5000000 yielding 410127700000000
+ 82025540 × 20000000 giving us 1640510800000000

= 2108091731007740
