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

[EX Q]: Problem: if the sides of a triangle are 26 cm , 24 cm and 15 cm , what is its area ?
[EX A]: 180

[EX Q]: Problem: a train running at the speed of 40 km / hr crosses a pole in 9 seconds . what is the length of the train ?
[EX A]: 100 meter

[EX Q]: Problem: if the price of a certain computer increased 30 percent from x dollars to 351 dollars , then 2 x =
[EX A]:
540