The school wants to plant a row of trees in front of a 50-meter-long teaching building, one tree every 5 meters (both ends need to be planted), how many saplings need to be prepared.
学校要在长50米的教学楼前植一排树，每5米栽一棵(两端要栽)，需要准备多少棵树苗．
<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<gadget id="calculator">10 + 1</gadget>
<output>11</output>

<result>11</result>