There are two squares in size. It is known that the small square is (4/5) the side length of the large square. What fraction of the area of the small square is the area of the large square?
大小两个正方形，已知小正方形是大正方形的边长的(4/5)，请问小正方形的面积是大正方形的面积的几分之几？
<gadget id="calculator">16 / 25</gadget>
<output>16/25 = around 0.64</output>

<result>16/25 = around 0.64</result>