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:
Let k(f) = 8*f. Let u(l) = -l**2 + 5*l - 1. Let r be u(4). Let v be k(r). What is the greatest common factor of v and 36?
answer:
12


question:
What is thirteen quarters of a litre in millilitres?
answer:
3250


question:
Let d = -5/863 + 30265/10356. What is the common denominator of 13/20 and d?
answer:

60