Uncle Zhang led several people to plant 111 poplar trees on the left side of a road (there is a tree at both ends), and the distance between every two adjacent trees is 4 meters. How long is this road in meters?
张大叔带领几个人在一条公路的左边种了111棵杨树，(两端都有一棵树)，每相邻两棵树之间的距离都是4米，这条公路长多少米？
<gadget id="calculator">111 - 1</gadget>
<output>110</output>

<gadget id="calculator">110 * 4</gadget>
<output>440</output>

<result>440</result>