A cylinder of plasticine has a base radius of 8 cm and a height of 10 cm. If it is pinched into a cone with a base radius of 20cm, what is the height of the cone?
一个圆柱形橡皮泥，底面半径8cm，高是10cm．如果把它捏成底面半径是20cm圆锥，这个圆锥的高是多少？
<gadget id="calculator">3 / 1_256</gadget>
<output>3/1_256 = around 0.002389</output>

<gadget id="calculator">3.14 * 64 * 10 * (3/1_256)</gadget>
<output>4.8</output>

<result>4.8</result>