user: I'm planning a new art project - a circular mural on one of the downtown walls. It's going to be quite large, with a 15-foot radius. To make sure I buy enough paint without overspending, I need to figure out the area of this circle. Can you help me with that calculation?

Available functions:
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