On both sides of a 50-meter-long circular runway, a colorful flag is inserted every 5 meters from the beginning to the end, how many colored flags are inserted in total.
在一条长50米的圆形跑道两旁，从头到尾每隔5米插一面彩旗，一共插多少面彩旗．
<gadget id="calculator">50 / 5</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>