During the festival, colorful flags should be placed on the 120-meter-long tower, with one side every 5 meters. Both ends must be inserted, how many sides should be inserted in total.
节日里，要在120米长的城楼上插彩旗，每隔5米插一面．两头都要插，一共要插多少面．
<gadget id="calculator">120 / 5</gadget>
<output>24</output>

<gadget id="calculator">24 + 1</gadget>
<output>25</output>

<result>25</result>