| 840 cm * | 0.01 m | = 8.4 m | 
| 1 cm | 
| Units of measurement | Lengths | 
|---|---|
| Nanometre | 8400000000.0 nm | 
| Micrometre | 8400000.0 µm | 
| Millimetre | 8400.0 mm | 
| Centimetre | 840.0 cm | 
| Inch | 330.708661417 in | 
| Foot | 27.5590551181 ft | 
| Yard | 9.186351706 yd | 
| Metre | 8.4 m | 
| Kilometre | 0.0084 km | 
| Mile | 0.005219518 mi | 
| Nautical mile | 0.0045356371 nmi | 
