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:
What is prob of picking 3 t and 1 b when four letters picked without replacement from {t: 5, b: 3}?
answer:
3/7


question:
Four letters picked without replacement from arkkallleaakkkra. What is prob of sequence lkak?
answer:
5/728


question:
How many millilitres are there in 53.6938 litres?
answer:

53693.8