The distance between A and B is 40km. Draw it on the map with a scale of 1:400000. What is the distance on the map?
甲、乙两地相距40km，用1：400000的比例尺画在图上，图上距离是多少．
<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<result>10</result>