Use a 10-meter-long steel bar to weld it into a rectangular billboard frame with a length-to-width ratio of 3:2 (the interface is omitted). What is the area of this billboard in square meters?
用一根长10米的钢筋，焊接成一个长和宽之比是3：2的长方形广告牌的框架(接口省略不计)．这个广告牌的面积是多少平方米？
<gadget id="calculator">10 / 2</gadget>
<output>5</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">5 * (3/5)</gadget>
<output>3</output>

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

<gadget id="calculator">5 * (3/5) * 5 * (2/5)</gadget>
<output>6</output>

<result>6</result>