Page 27-30 of the fourth issue of Mathematics Understanding the World, the second volume of the sixth grade. The answer is kneeling to give you extra points, such as refusing and other critical answers.
5.5 Except 2000000, 1 equals 1 1000000 cm.
1 10000000 times 5000001equal to1/5 cm equals 2.2 cm.
A: The length of the road in the picture is 2.2 cm.