Let’s have some fun with circles! The expression is used to calculate the area of a circle, where is an approximation of π (pi), and is the radius of the circle. Plugging in the numbers, you’d find that the area comes out to be approximately . That’s a whole lot of pizza or a giant hula hoop!

When working with formulas like this, be careful to square the radius before multiplying by π. A common mistake is to forget that squaring a number means multiplying it by itself, so is not , but rather . Always double-check your calculations to avoid those slip-ups!