Plant sweet-scented osmanthus trees around the school green space. The distance between two trees is 4 meters. Just 23 sweet-scented osmanthus trees are planted. What is the perimeter of the school green space?
在学校绿化地的一周种桂花树，两棵树之间的间距为4米，刚好种了23棵桂花树，学校绿化地的周长是多少．
<gadget id="calculator">4 * 23</gadget>
<output>92</output>

<result>92</result>