A cylindrical water tank has a circumference of 18.84 meters measured from the inside and a height of 3 meters. How many cubic meters of water can it hold?
一个圆柱形水箱，从里面量底面周长是18.84米，高3米，它最多能装多少立方米水？
<gadget id="calculator">18.84 / 3.14 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 3</gadget>
<output>84.78</output>

<result>84.78</result>