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

[EX Q]: Problem: two cycles are standing side - by - side . one cycle , which is 2.5 feets tall , casts a shadow that is 5 feets long . the other cycle is 2 feets tall . compute , in feets , the length of the shadow that the shorter cycle casts .
[EX A]: 4

[EX Q]: Problem: by selling an article for $ 195 , a person gains $ 45 . what is the gain % ?
[EX A]: 30 %

[EX Q]: Problem: at an election 2 candidates are participated and a candidate got 20 % of votes and defeated by 500 . and 10 votes are invalid . find the total polled votes ?
[EX A]:
843