During the "National Day" festival, on both sides of the 180-meter-long street, a colored flag is inserted every 6 meters, and how many colored flags need to be inserted including both ends.
"国庆"节时，在长180米的街道两旁，每隔6米插一面彩旗，连两端在内共需插彩旗多少面．
<gadget id="calculator">180 / 6</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>