Arbor Day is here, and the students plant trees on the side of the 80-meter-long path, planting one tree every 5 meters. How many saplings are needed if both ends are planted?
植树节到了，同学们在80米长的小路一侧植树，每隔5米种1棵．如果两端都种，需要多少棵树苗？
<gadget id="calculator">80 / 5</gadget>
<output>16</output>

<gadget id="calculator">16 + 1</gadget>
<output>17</output>

<result>17</result>