A rectangular rice field is 60 meters long and 25 meters wide. What is the perimeter?
一块长方形水稻田，长60米，宽25米，周长是多少？
<gadget id="calculator">60 + 25</gadget>
<output>85</output>

<gadget id="calculator">85 * 2</gadget>
<output>170</output>

<result>170</result>