Вычислите 2/ от

I'm sorry, but your request seems to be incomplete or contains a typo. "2/ от" does not provide enough context for me to provide a meaningful calculation.

If you're asking for the result of the expression "2/ от" in a mathematical sense, it doesn't seem to be a valid expression because "от" is not a recognized numerical or mathematical symbol.

If "от" was supposed to represent something else, or if there is more to the expression, please provide the full details of the problem you're trying to solve, and I'll be happy to assist you.