In order to do a good job of urban greening, the workers planted 76 plane trees between the railway station and the shopping mall. The distance between every two trees is 3 meters. Now, in order not to affect the growth of the trees, the distance should be adjusted to 5 meters. Then How many trees do not need to be moved?
为了搞好城市绿化，工人们在火车站和商场之间栽了76棵梧桐树，每两棵树的间隔是3米，现在为了不影响树的生长，要把间隔调准为5米，那么有多少棵树不需要移动位置？
<gadget id="calculator">7 + 1</gadget>
<output>8</output>

<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<result>16</result>