On a map with a scale of 1:1000000, the distance between the two places is 20. If on a map with a scale of 1:5000000, how many centimeters is the distance between the two places?

The actual distance is:
20÷1/1000000
=20×1000000
=20000000 cm
On a map with a scale of 1:5000000, the distance between the two places is:
20000000×1/5000000
=20×1/5
=4 cm
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