A rectangular pond is 55 meters long and 35 meters wide, what is the perimeter of the pond?
一个长方形的池塘长55米，宽35米，池塘的周长是多少米？
<gadget id="calculator">55 + 35</gadget>
<output>90</output>

<gadget id="calculator">90 * 2</gadget>
<output>180</output>

<result>180</result>