The upper base of a trapezoid is 1.4 meters, the lower base is 2.8 meters, and the height is 1.2 meters. What is the area in square meters?
一个梯形的上底是1.4米，下底是2.8米，高是1.2米，面积是多少平方米？
<gadget id="calculator">1.4 + 2.8</gadget>
<output>4.2</output>

<gadget id="calculator">1.2 / 2</gadget>
<output>0.6</output>

<gadget id="calculator">4.2 * 0.6</gadget>
<output>2.52</output>

<result>2.52</result>