4 decimeters in meters

Conversion

4 decimeters is equivalent to 0.4 meters.^[1]

We know (by definition) that: $1 dm = 0.1 m$

We can set up a proportion to solve for the number of meters.

\frac{1 dm}{4 dm} = \frac{0.1 m}{x m}

Now, we cross multiply to solve for our unknown $x$ :

x m = \frac{4 dm}{1 dm} * 0.1 m \to x m = 0.4 m

Conclusion: $4 dm = 0.4 m$

The inverse of the conversion factor is that 1 meter is equal to 2.5 times 4 decimeters.

It can also be expressed as: 4 decimeters is equal to $\frac{1}{2.5}$ meters.

An approximate numerical result would be: four decimeters is about zero meters, or alternatively, a meter is about zero times four decimeters.

[1] The precision is 15 significant digits (fourteen digits to the right of the decimal point).

Results may contain small errors due to the use of floating point arithmetic.