cylindrical iron block with a base radius of 10 cm and a height of 6 cm is melted into a cone. If the base radius of the cone is 20 cm, what is its height in cm?
把一个底面半径是10cm，高是6cm的圆柱形铁块熔化成一个圆锥，如果圆锥的底面半径是20cm，它的高是多少厘米？
<gadget id="calculator">3 / 1_256</gadget>
<output>3/1_256 = around 0.002389</output>

<gadget id="calculator">3.14 * 100 * 6 * (3/1_256)</gadget>
<output>4.5</output>

<result>4.5</result>