42 decimeters in centimeters

Conversion formula
How to convert 42 decimeters to centimeters?

We know (by definition) that: $1\mathrm{dm}=10\mathrm{cm}$

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

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

Conclusion: 42 ⁢ dm = 420 ⁢ cm

Conversion in the opposite direction

The inverse of the conversion factor is that 1 centimeter is equal to 0.00238095238095238 times 42 decimeters.

It can also be expressed as: 42 decimeters is equal to $\frac{1}{\mathrm{0.00238095238095238}}$ centimeters.

Approximation

An approximate numerical result would be: forty-two decimeters is about four hundred and twenty centimeters, or alternatively, a centimeter is about zero times forty-two decimeters.