Due to the school celebration, the school needs to place a colorful flag every 5 meters on both sides of the 80-meter-long road at the entrance (both ends of the road). How many colored flags are needed in total?
学校因校庆需要在进大门80米长路的两旁，每隔5米处插上一面彩旗(路两端都插)，共需要多少面彩旗．
<gadget id="calculator">80 / 5</gadget>
<output>16</output>

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

<gadget id="calculator">17 * 2</gadget>
<output>34</output>

<result>34</result>