A parked car dripping transmission fluid is creating a circular puddle whose area (in square inches) is A = r² where r is the radius of the circle in inches. Find the rate at which the area puddle is increasing at the instant when the radius is 18 inches and increasing at a rate of 4 inches per minute. When the radius is 18 inches, the area is changing at approximately (Round to the nearest thousandth as needed.) square inches per minute.

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