In a map whose scale is (1/5000000), the distance between Yushu and Xining is 16 centimeters measured with a scale. What is the actual distance between Yushu and Xining in kilometers?
一幅地图的比例尺是(1/5000000)的地图中，用刻度尺量得玉树至西宁的距离是16厘米，玉树到西宁的实际距离是多少千米．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">16 / (1/5_000_000) / 100_000</gadget>
<output>800</output>

<result>800</result>