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:
What is twenty-three sevenths of a week in hours?

Ex Output:
552


Ex Input:
What is fourty-three quarters of a millimeter in micrometers?

Ex Output:
10750


Ex Input:
Let x(k) = 11*k - 7. Let s = 8 - 5. What is the tens digit of x(s)?

Ex Output:

2