The area of a trapezoid is 48cm**2, the upper base is 2 cm, and the height is 8 cm. What is the lower base in cm?
一个梯形的面积是48cm**2，上底是2cm，高是8cm，它的下底是多少cm．
<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">48 * (1/4)</gadget>
<output>12</output>

<gadget id="calculator">12 - 2</gadget>
<output>10</output>

<result>10</result>