9*√7

To simplify the given expression, simply multiply the number outside the square root by the square root itself.

9 * √7 = 9√7

This is the simplest form of the expression, as √7 cannot be simplified further without resorting to decimal approximation since 7 is a prime number and does not have a square root that is a natural number. If you need a decimal approximation, √7 is approximately equal to 2.645751311, so:

9 * √7 ≈ 9 * 2.645751311 ≈ 23.81176279

Keep in mind that the approximation can be rounded depending on the level of precision required. For example, you might round it to:

23.81 (rounded to two decimal places) 23.812 (rounded to three decimal places) 23.8118 (rounded to four decimal places)