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

Input: Consider Input: Problem: the number of singles that a baseball player hit increased 10 percent from her first season to her second season , and the number of doubles that she hit in the same time period decreased by 1 percent . if the total number of singles and doubles that she hit increased 3 percent from her first season to her second season , what is the ratio of the number of singles she hit in her first season to the number of doubles she hit in her first season ?

Output: 4 : 7

Input: Consider Input: Problem: the area of a circular field is 17.56 hectares . find the cost of fencing it at the rate of rs . 7 per metre approximately

Output: 10400

Input: Consider Input: Problem: robert ' s salary was decreased by 70 % and subsequently increased by 70 % . how much percentage does he lose ?
Output: 49