A rectangular parallelepiped frame is welded with a 1m long iron wire, the circumference of its bottom is 30cm, what is the height in cm?
用一根长1m的铁丝焊接成一个长方体框架，它的底面周长是30cm，高是多少厘米？
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">1 * 25</gadget>
<output>25</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">25 - 15</gadget>
<output>10</output>

<result>10</result>