The school road from the school gate to the teaching building is 42 meters long. It is planned to place potted flowers on both sides from the starting point every 2 meters. How many potted flowers should be prepared in total.
从学校校门到教学楼的校道长42米，计划在两旁从起点每隔2米摆一盆花，一共要准备多少盆花．
<gadget id="calculator">42 / 2</gadget>
<output>21</output>

<gadget id="calculator">21 + 1</gadget>
<output>22</output>

<gadget id="calculator">22 * 2</gadget>
<output>44</output>

<result>44</result>