The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: ( 935421 x 625 ) = ?
[EX A]: 584638125

[EX Q]: Problem: the sum of the squares of the first 15 positive integers ( 1 ^ 2 + 2 ^ 2 + 3 ^ 2 + . . . + 15 ^ 2 ) is equal to 1240 . what is the sum of the squares of the second 15 positive integers ( 16 ^ 2 + 17 ^ 2 + 18 ^ 2 + . . . + 30 ^ 2 ) ?
[EX A]: 8215

[EX Q]: Problem: a train covers a distance of 12 km in 10 minutes . if it takes 8 seconds to pass a telegraph post , then the length of the train is
[EX A]:
160 m