The distance between A and B is 160 kilometers. The distance between the two cities is 4 cm measured on a map. On this map, the distance between cities B and C is measured to be 10 centimeters. How many kilometers is the actual distance between cities B and C?
甲、乙两城相距160千米，在一幅地图上量得这两城之间的距离是4厘米．在这幅地图上还量得乙、丙两城的距离是10厘米，乙、丙两城的实际距离是多少千米？
<gadget id="calculator">160 / 4</gadget>
<output>40</output>

<gadget id="calculator">40 * 10</gadget>
<output>400</output>

<result>400</result>