Alright, let's work through 10002490 times 31453333 step by step
10002490 × 31453333 = 31453333 × (10002490)
+ 31453333 × 0 what gives us 0
+ 31453333 × 90 yielding 2830799970
+ 31453333 × 400 resulting in 12581333200
+ 31453333 × 2000 that equals 62906666000
+ 31453333 × 00000 yielding 0
+ 31453333 × 000000 that results in 0
+ 31453333 × 0000000 what gives us 0
+ 31453333 × 10000000 producing 314533330000000

= 314611648799170
