- The upper base of a trapezoid is 5m, the lower base is 12m, and the height is 8m. What is its area in m**2.
-个梯形的上底是5m，下底是12m，高是8m，它的面积是多少m**2．
<gadget id="calculator">5 + 12</gadget>
<output>17</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">17 * 4</gadget>
<output>68</output>

<result>68</result>