The area of a trapezoid is 24 square decimeters, its upper base is 3 decimeters, and its height is 5 decimeters. What is its lower base?
一个梯形的面积是24平方分米，它的上底是3分米，高5分米，它的下底是多少分米．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">24 * (2/5)</gadget>
<output>48/5 = around 9.6</output>

<gadget id="calculator">(48/5) - 3</gadget>
<output>33/5 = around 6.6</output>

<result>33/5 = around 6.6</result>