A rectangle is 25 meters wide and its length is three times its width. What is the perimeter of the rectangle?
一个长方形宽25米，长是宽的3倍，这个长方形的周长是多少？
<gadget id="calculator">25 * 3</gadget>
<output>75</output>

<gadget id="calculator">75 + 25</gadget>
<output>100</output>

<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<result>200</result>