On one side of a 100-meter path, plant potted flowers every 5 meters, and plant both ends of the path, how many potted flowers are needed in total.
在一条100米的小路一侧，每隔五米栽一盆花，小路的两端都栽，共需要多少盆花．
<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<gadget id="calculator">20 + 1</gadget>
<output>21</output>

<result>21</result>