One decametre is equal to 10,000,000,000 nanometres.
I think you mean decameter and nanometer a decameter is 10 meters a nanometer is one billionth of a meter so a decameter is 10 billion nanometers
1 decameter = 32.808399 feet
A decameter is 10 meters.1 decameter = 393.700787 inches
1 decameter is 100 decimeters.
1 decameter is about 0.00621 (0.00621371192) miles.
1 decameter is equal to 10 meters.
10,000
1000
1 decameter = 10 meters 0.5 decameter = 5 meters
1 decameter = 0.01 km So, 5 decameter = 0.05 km
a decameter
1 Angstrom = 0.1 nanometers