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).

What is 0.7 take away 271816?
-271815.3

Calculate prob of sequence vgg when three letters picked without replacement from {v: 9, g: 5}.
15/182

Suppose 2*i - 12 = -2. Solve 0 = -2*c - 2*n - 4, i*n = 4*n + 2 for c.

-4