There is a square cardboard with a perimeter of (8/15) meters, what is its area in square meters?
有一块正方形的纸板，周长是(8/15)米，它的面积是多少平方米．
<gadget id="calculator">8 / 15</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">(8/15) / 4</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) * (2/15)</gadget>
<output>4/225 = around 0.017778</output>

<result>4/225 = around 0.017778</result>