Plant trees on one side of a 500-meter-long path (planting at both ends), and each tree is 5 meters apart. How many trees are needed?
在一条长500米小路的一边植树(两端都植)，每棵树间隔5米，需要多少棵．
<gadget id="calculator">500 / 5</gadget>
<output>100</output>

<gadget id="calculator">100 + 1</gadget>
<output>101</output>

<result>101</result>