The area of a trapezoidal plastic plate is 240 square centimeters, the upper base is 35 cm, and the lower base is 45 cm. What is the height in cm?
一个梯形塑料板面积是240平方厘米，上底35厘米，下底45厘米，高是多少厘米？
<gadget id="calculator">35 + 45</gadget>
<output>80</output>

<gadget id="calculator">2 / 80</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">240 * (1/40)</gadget>
<output>6</output>

<result>6</result>