Convert 196 mm to the format " cm mm".

There are $10 \text{ mm}$ in $1 \text{ cm}$.

$$1 \text{ cm} = 10 \text{ mm}$$

To convert millimeters to centimeters, divide by 10.

$$196 \text{ mm} = \frac{196}{10} \text{ cm} = 19.6 \text{ cm}$$

The whole number part is $19 \text{ cm}$.
The decimal part is $0.6 \text{ cm}$.
To convert $0.6 \text{ cm}$ back to millimeters, multiply by 10.

$$0.6 \text{ cm} \times 10 \text{ mm/cm} = 6 \text{ mm}$$

So, $19.6 \text{ cm}$ is equivalent to $19 \text{ cm}$ and $6 \text{ mm}$.

Therefore, $196 \text{ mm} = \boxed{\text{19 cm 6 mm}}$.