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).

Ex Input:
Let b be 4 + -1 + 72490/16. Let r = 4524 - b. Find the common denominator of 4 + -2 - (-83)/(-4) and r.

Ex Output:
8


Ex Input:
Let x(i) = i**3 + 5*i**2 - 6*i + 2. Let m be x(-6). Suppose 0 = -m*d + d + 13. What is the tens digit of d?

Ex Output:
1


Ex Input:
What is 1.575664 grams in kilograms?

Ex Output:

0.001575664