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).

Ex Input:
Four letters picked without replacement from {u: 9, s: 9}. Give prob of picking 3 s and 1 u.

Ex Output:
21/85


Ex Input:
Convert 343372.3cm to meters.

Ex Output:
3433.723


Ex Input:
Suppose 5*j - 3*g = g + 7, -2*g - 8 = -4*j. Suppose -x + 10 + 32 = -4*p, j*x - 156 = -3*p. What is the highest common divisor of x and 20?

Ex Output:

10