The square root of $3.24$ is:

$\sqrt{3.24} = 1.8$

Would you like more details or have any questions?

Here are 5 related questions you might find interesting:

1. What is the square root of 2.25?
2. How do you find the square root of a decimal?
3. Can all decimal numbers have a square root?
4. What is the square root of 0.81?
5. How do you approximate the square root of non-perfect squares?

Tip: When calculating square roots of decimals, it helps to first express the decimal as a fraction, if possible.