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:
Calculate prob of sequence rkk when three letters picked without replacement from {r: 12, k: 3}.

Ex Output:
12/455


Ex Input:
Suppose 4*i + i = 45. Suppose 3*u = i*u - 132. Let v = -82 + 147. Calculate the remainder when v is divided by u.

Ex Output:
21


Ex Input:
Let s(r) = -r + 7. Let u be s(6). Let o(j) = 1 + 5 - j + u. Calculate the smallest common multiple of 1 and o(4).

Ex Output:

3