Given a simple high-school level math question, you are required to solve it and provide the final answer. The final answer is always a single number. These questions can range from a variety of topics like simple arithmetic, solving equations, converting a quantity from one unit to another, finding remainders/GCD/LCM, finding probabilities etc. Each question has only one correct answer. This answer can be a positive or negative integer, a fraction or a decimal number. If the answer is a negative number use the hyphen (e.g. -42) symbol for the minus sign. For decimal numbers, do not add extra zeros after the decimal point. For fractional numbers, separate the numerator and denominator using a forward slash (e.g. 3/25).

Input: Consider Input: Solve 4*q - 5*s + 0*s + 19 = 0, -2 = -4*q - 2*s for q.

Output: -1


Input: Consider Input: What is thirteen quarters of a litre in millilitres?

Output: 3250


Input: Consider Input: Four letters picked without replacement from {u: 3, y: 3, q: 5}. What is prob of sequence qquq?


Output: 1/44