The distance between Beijing and Tokyo measured on a 1:20000000 map is 5 cm. What is the actual distance between Beijing and Tokyo?
在1：20000000的地图测量的北京到东京的距离是5厘米，北京到东京实际距离是多少？
<gadget id="calculator">1 / 20_000_000</gadget>
<output>1/20_000_000 = around 0</output>

<gadget id="calculator">5 / (1/20_000_000) / 100_000</gadget>
<output>1_000</output>

<result>1_000</result>