user: I'm working on a community art project and planning a large circular mural for a public space. To figure out how much paint I need to buy, I need to calculate the area of the circle I'll be painting. The wall space I've been given has a perfect circular area with a radius of 15 feet. Can you help me determine the area of this circle?

Available functions:
name: calculate_electrostatic_potential_energy
description: Calculates the electrostatic potential energy.
parameters: type: dict
properties: charge: type: float
description: The charge of the object, in coulombs.
voltage: type: float
description: The voltage of the object, in volts.
required: charge
voltage
name: geometry_area_circle
description: Calculates the area of a circle.
parameters: type: dict
properties: radius: type: integer
description: The radius of the circle, in feet.
required: radius