Three fourths of a wood is equal to a fraction of the same three

Three fourths of a wood is equal to a fraction of the same three

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What are the metric length units under mm? What is the rate of advance
I remember when I was in primary school, I didn't say that the progressive rate between length units was 10? Is there any 10 length units = 1 mm? Tell me the progressive rate between these units and the upper level units and meters

1km (km) = 1000m (m) = 1km (km)
1 meter (m) = 1000 mm (mm) = 10 decimeter (DM) = 100 cm (CM)
1 mm (mm) = 1000 μ M
1 μ M = 1000 nm
1 nanometer (nm) = 1000 Pico meters (PM) = 10 Angstrom (a) (smaller than nanometer is rarely used)
1 Pico meter (PM) = 1000 flying meters (FM)
One foot = 10 feet, one foot = 10 inches, one inch = 10 minutes (one foot = 33.33 cm, that is, three feet = 1 meter)

Several seconds to several seconds. Several orders of magnitude. Space span several meters to several meters, several orders of magnitude
Know the span of time and space of physics research.
Time span: s, total orders of magnitude, space span: m, total orders of magnitude

Time: 0 seconds (birth of the universe) ~ 13.8 billion years (age of the universe) ~ infinity (Theory)
Space: (10 ^ - 18 m) the distance of weak interaction within the nucleus ~ infinity (universe), and the commonly used maximum unit is light year