instruction:
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).
question:
Calculate prob of picking 1 x, 1 r, 1 z, and 1 b when four letters picked without replacement from brrrzaxra.
answer:
2/63


question:
Convert 0.9559904cm to kilometers.
answer:
0.000009559904


question:
Let p = -24 - -13. Let i(d) = d**3 + 10*d**2 - 11*d + 4. Let f be i(p). Solve -f = -j - 3*j for j.
answer:

1