A cuboid iron block whose length, width, and height are 40 cm, 10 cm, and 3.14 cm is melted and cast into a cylinder. The bottom area of this cylinder is 314 cm2. What is the height in cm?
把一个长、宽、高分别为40厘米、10厘米、3.14厘米的长方体铁块熔铸成一个圆柱体，这个圆柱体的底面积是314平方厘米，高是多少厘米？
<gadget id="calculator">3.14 / 314</gadget>
<output>0.01</output>

<gadget id="calculator">40 * 10 * 0.01</gadget>
<output>4</output>

<result>4</result>