If a cylinder with a base radius of 2 cm and a height of 5 cm is cut into the largest cone, what is the volume of the cut part?
把一段底面半径为2厘米，高为5厘米的圆柱削成一个最大的圆锥，削去部分的体积是多少．
<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">3.14 * 4 * 5 * (2/3)</gadget>
<output>41.866667</output>

<result>41.866667</result>