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).

Input: Consider Input: Convert 6.264243mg to tonnes.

Output: 0.000000006264243


Input: Consider Input: -1584 divided by 48

Output: -33


Input: Consider Input: Suppose 158 = 4*d - k, -d = -0*d - 5*k - 49. Suppose 6*f - 2*f = 52. Calculate the greatest common divisor of d and f.


Output: 13