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).

Example Input: Convert 6.264243mg to tonnes.
Example Output: 0.000000006264243

Example Input: What is prob of sequence kcv when three letters picked without replacement from kkkckvknnknvkn?
Example Output: 1/156

Example Input: Three letters picked without replacement from {i: 3, b: 3, a: 1, o: 2, y: 1, g: 1}. Give prob of sequence bbi.
Example Output:
1/55