A square with a side length of 9 cm divides it into four smaller squares of equal size. What is the area of the smaller squares?
一个正方形边长9厘米把它分成四个相等大小的小正方形请问小正方形的面积是多少？
<gadget id="calculator">9 / 4</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">9 * (9/4)</gadget>
<output>81/4 = around 20.25</output>

<result>81/4 = around 20.25</result>