The perimeter of a rectangular vegetable field is 40 meters, and the ratio of length to width is 3:2. What is the width of this vegetable field?
一个长方形的菜地周长是40米，长与宽的比是3：2，这块菜地的宽是多少？
<gadget id="calculator">40 / 2</gadget>
<output>20</output>

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

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

<gadget id="calculator">20 * (2/5)</gadget>
<output>8</output>

<result>8</result>