\label{Variables_in_the_Answer_Block}

You can use variables in the \textbf{Answer} part of the question. This
means you can compute an answer to a question.
If you set the answer of the question to be \textbf{\$variable}, \textbf{Save
Changes} and \textbf{View} it, you'll see that LON-CAPA is now expecting
{}``3.0'' as the answer, plus or minus 5\%.