| 8400 mm * | 0.1 cm | = 840.0 cm | 
| 1 mm | 
| Unidad de medida | Longitud | 
|---|---|
| Nanómetro | 8400000000.0 nm | 
| Micrómetro | 8400000.0 µm | 
| Milímetro | 8400.0 mm | 
| Centímetro | 840.0 cm | 
| Pulgada | 330.708661417 in | 
| Pie | 27.5590551181 ft | 
| Yarda | 9.186351706 yd | 
| Metro | 8.4 m | 
| Kilómetro | 0.0084 km | 
| Milla | 0.005219518 mi | 
| Milla náutica | 0.0045356371 nmi | 
