If the perimeter of a rectangle is 25 cm and the ratio of length to width is 3:2, what is its area?
一个长方形的周长是25厘米，长和宽的比是3：2，它的面积是多少．
<gadget id="calculator">25 / 2</gadget>
<output>25/2 = around 12.5</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">(25/2) * (3/5)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(25/2) - (15/2)</gadget>
<output>5</output>

<gadget id="calculator">(15/2) * 5</gadget>
<output>75/2 = around 37.5</output>

<result>75/2 = around 37.5</result>