A cylindrical steel material with a radius of 5 cm and a length of 10 cm is cast into a cone with a base area of 314 cm**2. What is the height of the cone in cm?
把一根半径5cm，长10cm的圆柱形钢材铸成一个底面积是314cm**2的圆锥，圆锥的高是多少cm．
<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3 / 314</gadget>
<output>3/314 = around 0.009554</output>

<gadget id="calculator">3.14 * 25 * 10 * (3/314)</gadget>
<output>7.5</output>

<result>7.5</result>