It's about 0.00000005 times as long as The Circumfrence of Earth
In other words, 3.920 cubits is 0.0000000447217310 times the length of The Circumfrence of Earth, and the length of The Circumfrence of Earth is 22,360,494 times that amount.(Equatorial)
The Earth — not a perfect sphere, but rather an oblate spheroid with bulged middle — has an Equatorial circumference of approximately 87,653,136 cubits. 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 0.000000005 times as long as The Distance from Earth to the Moon
In other words, 3.920 cubits is 0.0000000046619510 times the length of The Distance from Earth to the Moon, and the length of The Distance from Earth to the Moon is 214,502,500 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 840,849,700 cubits 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 wide as a Glucose Molecule
In other words, 3.920 cubits is 1,200,000,000 times the width of a Glucose Molecule, and the width of a Glucose Molecule is 0.000000000830 times that amount.(C6H12O6, a.k.a. grape sugar) (open chain form)
Am individual glucose molecule measures 0.00000000330 cubits 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.