There is a cylindrical steel, if cut along its diameter, the cross-section is exactly a square, the circumference of the bottom of this cylinder is known to be 6.28 decimeters, what is the volume of this steel in cubic decimeters.
有一根圆柱形钢材，如果沿它的直径切开，截面正好是一个正方形，已知这个圆柱的底面周长是6.28分米，这根钢材的体积是多少立方分米．
<gadget id="calculator">6.28 / 3.14</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 2</gadget>
<output>6.28</output>

<result>6.28</result>