A cylindrical iron block has a base radius of 10 cm and a height of 5 cm. If it is melted and cast into a conical iron block with a base area of 157 cm**2, what is the height of the cone?
一个圆柱形铁块的底面半径是10cm，高是5cm，把它熔铸成一个底面积是157cm**2的圆锥形铁块，圆锥的高是多少？
<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3 / 157</gadget>
<output>3/157 = around 0.019108</output>

<gadget id="calculator">3.14 * 100 * 5 * (3/157)</gadget>
<output>30</output>

<result>30</result>