The length of a rectangle is 58 meters and twice its width, what is its perimeter?
一个长方形长是58米，是宽的2倍，它的周长是多少？
<gadget id="calculator">58 / 2</gadget>
<output>29</output>

<gadget id="calculator">58 + 29</gadget>
<output>87</output>

<gadget id="calculator">87 * 2</gadget>
<output>174</output>

<result>174</result>