The base length of a parallelogram is (2/7) meters and the height is 3 meters. What is its area in square meters?
一个平行四边形的底长(2/7)米，高3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">(2/7) * 3</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>