Put a piece of steel into a cylindrical water storage bucket with a diameter of 2 meters at the bottom, and the water level rises by 5 decimeters, find the volume of the piece of steel.
将一根钢材底面直径为2米的圆柱形储水桶里，水面上升了5分米，求这块钢材的体积．
<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 5</gadget>
<output>1_570</output>

<result>1_570</result>