Alright, let's work through 25225585 times 99842043 step by step
25225585 × 99842043 = 99842043 × (25225585)
+ 99842043 × 5 which equals 499210215
+ 99842043 × 80 what gives us 7987363440
+ 99842043 × 500 which equals 49921021500
+ 99842043 × 5000 which equals 499210215000
+ 99842043 × 20000 that is equal 1996840860000
+ 99842043 × 200000 yielding 19968408600000
+ 99842043 × 5000000 that results in 499210215000000
+ 99842043 × 20000000 what gives us 1996840860000000

= 2518573942270155
