At times, when you want to compute the result of a mathematical formula, you can use MySQL to do the task. It is a great tool for this. Here are a few examples:

Query:

SELECT PI();

Output:

+------------+| PI()       |+------------+| 3.141593   |+------------+

Query:

SELECT PI() * 7;

Output:

+------------+| PI() * 7   |+------------+| 21.991149  |+------------+

Query:

SELECT 399*12/4, 6*12;

Output:

+------------+------------+| 399*12/4   | 6*12       |+------------+------------+| 1197.0000  | 72         |+------------+------------+