trapezoid and a parallelogram have the same area. It is known that the upper base of the trapezoid is 27 cm, the height of the lower base is 33 cm, and the height is 20 cm. The base of the parallelogram is 24 cm. How many cm is the height? (solution by equation)
一个梯形和一个平行四边形面积相等．已知梯形的上底是27厘米，下底高是33厘米，高是20厘米，平行四边形底是24厘米，高是多少厘米？(用方程解)
<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">27 * 10</gadget>
<output>270</output>

<gadget id="calculator">33 * 10</gadget>
<output>330</output>

<gadget id="calculator">270 + 330</gadget>
<output>600</output>

<gadget id="calculator">600 / 24</gadget>
<output>25</output>

<result>25</result>