\( 3.14 \cdot ( 40 cm ) ^ { 2 } \)

Let’s have some fun with circles! The expression \( 3.14 \cdot ( 40 cm )^{2} \) is used to calculate the area of a circle, where \( 3.14 \) is an approximation of π (pi), and \( 40 cm \) is the radius of the circle. Plugging in the numbers, you’d find that the area comes out to be approximately \( 5026 cm^{2} \). 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 \( (40 cm)^{2} \) is not \( 40 cm \times 2 \), but rather \( 40 cm \times 40 cm \). Always double-check your calculations to avoid those slip-ups!