It's about 0.00000004 times as long as The Circumfrence of Earth
In other words, 2.10 paces is 0.0000000399301170 times the length of The Circumfrence of Earth, and the length of The Circumfrence of Earth is 25,043,753 times that amount.(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 52,591,882 paces. The first airplane trip around the circumference of the Earth (with a few stops along the way), was completed in 1924 by the United States Army Air Service, and took 175 days.
It's about 0.000000004 times as long as The Distance from Earth to the Moon
In other words, 2.10 paces is 0.0000000041624560 times the length of The Distance from Earth to the Moon, and the length of The Distance from Earth to the Moon is 240,242,800 times that amount.(a.k.a. Luna) (median of semi-major axis, or apigee, and semi-minor axes, or perigee)
The orbit of the Moon around the Earth is elliptical, with an average distance of 504,509,800 paces from center-to-center. About 428.376 kg of moon rock have been cataloged on the Earth, from the American Apollo and Soviet Luna Programs, and from samples that have been extracted from meteorites.
It's about 1,000,000,000 times as long as a Glucose Molecule
In other words, 2.10 paces is 1,100,000,000 times the length of a Glucose Molecule, and the length of a Glucose Molecule is 0.000000000910 times that amount.(C6H12O6, a.k.a. grape sugar) (open chain form)
Am individual glucose molecule measures 0.00000000200 paces in its open-chain form. Glucose is the most common fuel source of energy in human biology, with 3.75 kilocalories of energy per gram.