A trapezoid has an area of 120 square decimeters and a height of 8 decimeters. What is the sum of the upper and lower bases of this trapezoid?
一个梯形的面积是120平方分米，高是8分米．这个梯形的上底和下底的和是多少分米．
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">120 * (1/4)</gadget>
<output>30</output>

<result>30</result>