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: Calculate prob of sequence vgg when three letters picked without replacement from {v: 9, g: 5}.

Output: 15/182


Input: Consider Input: What is the value of (-11 - (-1 - 7)) + (9 - 1)?

Output: 5


Input: Consider Input: Suppose 3*g = 2*k + 220, 90 + 56 = 2*g - 2*k. What is the tens digit of g?


Output: 7