Changling Elementary School has a square experimental field with a side length of 32 meters and a fence around it. How long is the fence?
长岭小学有一块正方形实验园地，边长是32米，四周要围上篱笆，篱笆长多少米？
<gadget id="calculator">32 * 4</gadget>
<output>128</output>

<result>128</result>