A cylindrical grain storehouse, the circumference of the bottom surface measured from the inside is 25.12 meters, and the height is 3 meters. What is the volume of this grain storehouse in cubic meters?
一个圆柱形粮囤，从里面量底面周长是25.12米，高3米，求这个粮囤的容积是多少立方米？
<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16 * 3</gadget>
<output>150.72</output>

<result>150.72</result>