Alright, let's work through 25439410 times 42511498 step by step
25439410 × 42511498 = 42511498 × (25439410)
+ 42511498 × 0 giving us 0
+ 42511498 × 10 yielding 425114980
+ 42511498 × 400 producing 17004599200
+ 42511498 × 9000 that is equal 382603482000
+ 42511498 × 30000 that equals 1275344940000
+ 42511498 × 400000 what gives us 17004599200000
+ 42511498 × 5000000 that is equal 212557490000000
+ 42511498 × 20000000 yielding 850229960000000

= 1081467427336180
