On a map, the distance between A and B is 640 kilometers, which is only 32 centimeters on the map, and the distance between B and C is 12 centimeters on the map. How many kilometers are the actual distance between B and C?
在一幅地图上，甲、乙两地相距640千米，在图上只有32厘米，乙、丙两地在图上是12厘米，乙、丙两地实际相距多少千米？
<gadget id="calculator">640 / 32</gadget>
<output>20</output>

<gadget id="calculator">20 * 12</gadget>
<output>240</output>

<result>240</result>