To celebrate "June 1", colorful flags were planted on both sides of the 150-meter-long main road of the school, and one side was inserted every 5 meters (both ends must be inserted), and how many colored flags should be planted in total.
为庆祝"六一"，在学校长150米的主行道的两旁插上彩旗，每间隔5米插上一面(两端都要插)，一共要插多少面彩旗．
<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<gadget id="calculator">30 + 1</gadget>
<output>31</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<result>62</result>