Workers on the road section are going to plant trees on one side of a road, and at both ends, with a distance of 16 meters between every two trees. A total of 208 trees have been planted. How long is this road in meters?
公路段工人准备在一条公路的一边种树，两端都种，每两棵树之间相隔16米，一共种了208棵树，这条公路长多少米？
<gadget id="calculator">208 - 1</gadget>
<output>207</output>

<gadget id="calculator">207 * 16</gadget>
<output>3_312</output>

<result>3_312</result>