A question about the application of scientific notation: The beautiful earth we live on is a nearly circular sphere. Its radius is about 6.4 × 10 kilometers to the sixth power. If you take a trip, you can fly along the orbit for 20 days, which is equal to the radius of the earth. Please calculate how many kilometers you have to fly every day? (the result is expressed by scientific notation)

6.4 × 10 divided by 20 = 3.210

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