On a map, the actual distance of 400km is represented by a line segment with a length of 2cm. The distance between A and B measured on this map is 6.5cm. Find the actual distance between A and B (use a proportional solution).
在一副地图上，用2cm长的线段表示实际距离400km，在这幅地图上量的甲、乙两地的距离是6.5cm，求甲、乙两地的实际距离(用比例解)．
<gadget id="calculator">400 / 2</gadget>
<output>200</output>

<gadget id="calculator">200 * 6.5</gadget>
<output>1_300</output>

<result>1_300</result>