A rectangular field has a perimeter of 60 meters. The ratio of length to width is 3:2. If 1.2 kilograms of rice can be produced per square meter, how many kilograms of rice can this piece of arable land produce?
一块长方形的耕地，周长是60米．长和宽的比是3：2，如果每平方米能产稻谷1.2千克，这块耕地能产稻谷多少千克？
<gadget id="calculator">60 / 2</gadget>
<output>30</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">30 * (3/5)</gadget>
<output>18</output>

<gadget id="calculator">30 - 18</gadget>
<output>12</output>

<gadget id="calculator">18 * 12 * 1.2</gadget>
<output>259.2</output>

<result>259.2</result>