Wang Village wants to plant trees on both sides of a 500-meter-long road, planting one tree every 5 meters (both ends must be loaded), how many saplings are needed in total.
王村要在一条长500米的路的两旁栽树，每隔5米栽一棵(两端都要载)，一共需要多少棵树苗．
<gadget id="calculator">500 / 5</gadget>
<output>100</output>

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

<gadget id="calculator">101 * 2</gadget>
<output>202</output>

<result>202</result>