The area of a trapezoid is 80 square centimeters, and the sum of the upper and lower bases is 20 centimeters. What is the height of the trapezoid in centimeters?
一个梯形的面积是80平方厘米，上底与下底的和是20厘米，这个梯形的高是多少厘米？
<gadget id="calculator">2 / 20</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 * (1/10)</gadget>
<output>8</output>

<result>8</result>