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).
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Question: In base 8, what is -40 - 32?

Answer: -72


Question: How many centimeters are there in three tenths of a meter?

Answer: 30


Question: Two letters picked without replacement from {l: 4, r: 1, d: 5}. Give prob of sequence dd.

Answer:
2/9