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).

Example Input: What is 51/2 of a millisecond in microseconds?
Example Output: 25500

Example Input: Two letters picked without replacement from dmmkpmkkkmmdqqkmpd. What is prob of picking 2 p?
Example Output: 1/153

Example Input: Let y(i) = -i**3 + 9*i**2 + 12*i - 14. Let n be y(10). Calculate the highest common factor of n and 42.
Example Output:
6