There are two squares, big and small. The side length of the small square is 1/3 of the side length of the big square. What fraction of the area of the big square is the area of the small square?
有大小两个正方形，小正方形的边长是大正方形边长的(1/3)，小正方形的面积是大正方形面积的几分之几？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<result>1/9 = around 0.111111</result>