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To convert centimeters to nanometers, you need to use the fact that 1 centimeter is equal to 10,000,000 nanometers.
So, if you want to find out how many nanometers are in 1 centimeter, you would multiply 1 by 10,000,000:
1 centimeter * 10,000,000 nanometers/centimeter = 10,000,000 nanometers
Therefore, there are 10,000,000 nanometers in 1 centimeter.