my country's "National Flag Law" stipulates that the ratio of the length to the width of the national flag is 3:2. It is known that the circumference of a national flag is 100 decimeters. What is the area of the national flag in square decimeters?
我国《国旗法》规定，国旗的长和宽的比是3：2，已知一面国旗的周长是100分米，这面国旗的面积是多少平方分米？
<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">50 * (3/5)</gadget>
<output>30</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">50 * (2/5)</gadget>
<output>20</output>

<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<result>600</result>