70.7km to dm

1. Understand the conversion factor between kilometers and decimeters:
1 \, \text{km} = 10,000 \, \text{dm}

2. Multiply the given distance in kilometers by the conversion factor:
70.7 \, \text{km} \times 10,000 \, \text{dm/km}

3. Perform the multiplication:
70.7 \, \text{km} \times 10,000 = 707,000 \, \text{dm}

Thus, the answer is

707,000 \, \text{dm}