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:
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:
Four letters picked without replacement from {q: 1, h: 1, u: 1, e: 1, r: 1}. Give prob of picking 2 q, 1 h, and 1 r.

Ex Output:
0


Ex Input:
Suppose 3*h + 3*w - 64 = -1, -4*w = -4*h + 100. What is the tens digit of h?

Ex Output:

2