The perimeter of a square tablecloth is 4.2 meters, what is its area in square meters?
一块正方形的桌布周长是4.2米，它的面积是多少平方米？
<gadget id="calculator">4.2 / 4</gadget>
<output>1.05</output>

<gadget id="calculator">1.05 * 1.05</gadget>
<output>1.1025</output>

<result>1.1025</result>