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:
Convert 39.12191 tonnes to milligrams.
answer:
39121910000


question:
What is prob of picking 1 u and 3 h when four letters picked without replacement from {r: 3, m: 4, h: 3, u: 1}?
answer:
1/330


question:
Let x be (3 - 1)/(6/9). Suppose o = 2, -h - 13 = -5*o - 5. Solve -x*l = 2*r - 14, -2*r - h*l = -3*r for r.
answer:

4