There is a road with a length of 950 meters, and a sapling is planted 5 meters next to it. No trees are planted at the head and tail. How many trees do you need to prepare in total?
有一条长950米的公路，隔壁5米栽一棵树苗，头和尾不栽树，一共需要准备多少颗树？
<gadget id="calculator">950 / 5</gadget>
<output>190</output>

<gadget id="calculator">190 - 1</gadget>
<output>189</output>

<result>189</result>