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:
Three letters picked without replacement from {q: 5, b: 3, o: 1}. What is prob of picking 1 o and 2 b?

Ex Output:
1/28


Ex Input:
Two letters picked without replacement from naioiaaiaaaia. Give prob of picking 1 n and 1 i.

Ex Output:
2/39


Ex Input:
Four letters picked without replacement from wmxpwwpwwxgwxrmgwxpw. What is prob of picking 1 r, 2 g, and 1 p?

Ex Output:

1/1615