Cut out a square with the same size and the largest area on a piece of rectangular red paper with a length of 40 cm and a width of 32 cm, and there is no remainder. What is the area of each square in square centimeters?
在一张长40厘米，宽32厘米的长方形红纸上裁出同样大小，面积最大的正方形，并且没有剩余．每个正方形的面积是多少平方厘米？
<gadget id="calculator">2 * 2 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 8</gadget>
<output>64</output>

<result>64</result>