The upper base of a trapezoid is (2/7) meters, the lower base is (3/5) meters, and the height is (1/6) meters. What is its area in square meters?
一个梯形上底是(2/7)米，下底是(3/5)米，高是(1/6)米，它的面积是多少平方米？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(2/7) + (3/5)</gadget>
<output>31/35 = around 0.885714</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) / 2</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(31/35) * (1/12)</gadget>
<output>31/420 = around 0.07381</output>

<result>31/420 = around 0.07381</result>