Convert 456 mm to cm

1. Recognize the conversion factor:
1 \text{ cm} = 10 \text{ mm}

2. Set up the conversion:
456 \text{ mm} \times \frac{1 \text{ cm}}{10 \text{ mm}}

3. Cancel out the mm units and compute the result:
\frac{456}{10} = 45.6 \text{ cm}

Answer:
45.6 \text{ cm}