The height of a trapezoid is 8 cm, the upper base is 5 cm, and the lower base is 19 cm. What is the area in square centimeters?
一个梯形的高是8厘米，上底是5厘米，下底是19厘米，面积是多少平方厘米．
<gadget id="calculator">5 + 19</gadget>
<output>24</output>

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

<gadget id="calculator">24 * 4</gadget>
<output>96</output>

<result>96</result>