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:
19 divided by 19

Ex Output:
1


Ex Input:
Let a(g) = g**3 - 2*g**2 + g - 2. Let v be a(3). Let x = v + 15. What is the units digit of x?

Ex Output:
5


Ex Input:
Let y(m) = -m - 3. Let v be y(-6). Suppose v*c = 10 + 8. What is the units digit of c?

Ex Output:

6