There is a cylindrical gift box with a bottom circumference of 12.56 decimeters and a height of 0.5 decimeters. What is its volume in cubic meters?
有一个圆柱形礼品盒底面周长是12.56分米，高0.5分米，它的体积是多少立方米？
<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">3.14 * 4 * 0.5</gadget>
<output>6.28</output>

<result>6.28</result>