Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.

Input: Consider Input: Problem: what is the least number of squares tiles required to pave the floor of a room 15.17 m long and 9.02 m broad ?
Options: ['a. 814', 'b. 266', 'c. 287', 'd. 999', 'e. 661']

Output: a


Input: Consider Input: Problem: when x is multiplied by 3, the result is 10 more than the result of subtracting x from 26. what is the value of x ?
Options: a. - 4, b. 9, c. 11, d. 13, e. 22

Output: b


Input: Consider Input: Problem: if the price of petrol increases by 40, by how much must a user cut down his consumption so that his expenditure on petrol remains constant ?
Options: a. 25 %, b. 20 %, c. 16.67 %, d. 28.6 %, e. none of these


Output: d