A cylindrical glass with a base circumference of 3.14 cm contains some water. Now put a glass bead into a cup and submerge it in the water. At this time, the water level rises by 4 mm. What is the volume of the glass bead in cubic centimeters?
一个底面周长是3.14厘米的圆柱形玻璃杯内盛有一些水．现将一个玻璃珠放入杯子中，浸没在水里，这时水面上升了4毫米．这个玻璃珠的体积是多少立方厘米？
<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 0.4</gadget>
<output>0.314</output>

<result>0.314</result>