A rectangular garden is 34 meters long, and its width is 4 meters less than its length. A fence is to be planted around the garden. How long is the fence?
一个长方形花园，长34米，宽比长少4米，在这个花园的四周要种上篱笆，篱笆长多少米？
<gadget id="calculator">34 - 4</gadget>
<output>30</output>

<gadget id="calculator">34 + 30</gadget>
<output>64</output>

<gadget id="calculator">64 * 2</gadget>
<output>128</output>

<result>128</result>