A piece of steel can be used to make a cylindrical part with a base diameter of 4 cm and a height of 3 cm. If it is transformed into a conical part with a base area of 12.56 square centimeters, what is the height of the part in centimeters?
有一段钢可做一个底面直径4厘米，高3厘米的圆柱形零件．如果把它改制成底面积是12.56平方厘米的圆锥形零件，零件的高是多少厘米？
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / (1/3) / 12.56</gadget>
<output>0.716561</output>

<gadget id="calculator">3.14 * 4 * 0.716561</gadget>
<output>9.000006</output>

<result>9.000006</result>