The area of a trapezoid is 80 square centimeters and the height is 20 centimeters. What is the sum of the upper and lower bases in centimeters?
一个梯形的面积是80平方厘米，高是20厘米，则上、下底之和是多少厘米
<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>