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 800 cm, and what is the area in square centimeters.
国旗长和宽的比是3：2，已知一面国旗的周长是800厘米，面积是多少平方厘米．
<gadget id="calculator">800 / 2</gadget>
<output>400</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">400 * (3/5)</gadget>
<output>240</output>

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

<gadget id="calculator">400 * (2/5)</gadget>
<output>160</output>

<gadget id="calculator">240 * 160</gadget>
<output>38_400</output>

<result>38_400</result>