The distance between two maps on a city map is 10cm, which means the actual distance is 30km. There is a lake in this city with a circumference of 27.6 kilometers. What is the length of the lake on this map in centimeters?
一座城市地图上两地图上距离为10cm，表示实际距离30km．在这座城市中有一湖，湖面一周长27.6千米．湖在这幅地图上湖面一周长多少厘米．
<gadget id="calculator">27.6 / 30</gadget>
<output>0.92</output>

<gadget id="calculator">0.92 * 10</gadget>
<output>9.2</output>

<result>9.2</result>