The perimeter of a square is (7/9) meters, what is its area in square meters?
一个正方形的周长是(7/9)米，它的面积是多少平方米？
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">(7/9) / 4</gadget>
<output>7/36 = around 0.194444</output>

<gadget id="calculator">(7/36) * (7/36)</gadget>
<output>49/1_296 = around 0.037809</output>

<result>49/1_296 = around 0.037809</result>