Li Zhuang builds a canal with a trapezoidal cross section, the upper base is 3.2m, the lower base is 1.4m, and the canal is 1.2m deep. What is the cross-sectional area of this canal in square meters?
李庄修一条水渠，横截面是一个梯形，上底是3.2m，下底是1.4m，渠深1.2m．这条水渠的横截面积是多少平方米？
<gadget id="calculator">3.2 + 1.4</gadget>
<output>4.6</output>

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

<gadget id="calculator">4.6 * 0.6</gadget>
<output>2.76</output>

<result>2.76</result>