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 s(o) = -9*o + 2. What is the remainder when s(-3) is divided by 17?

Answer: 12


Question: What is the units digit of ((-7)/14)/((-2)/228)?

Answer: 7


Question: Let r be 5722/(-1554) - 1/3. Let b = 57/74 - r. What is the common denominator of 49/20 and b?

Answer:
140