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 five quarters of a micrometer in nanometers?
Example Output: 1250

Example Input: Calculate prob of sequence pd when two letters picked without replacement from {d: 2, c: 1, m: 2, p: 2, z: 1}.
Example Output: 1/14

Example Input: Suppose 22 = 2*b + 4*f, 6*b - 2*b = -3*f + 29. Solve -d - 5 = -3*z, 3*z + 4*d + 0*d = -b for z.
Example Output:
1