Divide cm by 100,000 to get km:
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4 kilometers=400,000 centimeters
By dividing the number of centimeters by 100,000.
Multiply by 100000. So 2.8 km * 100000 = 280000 centimeters.
1 km = 100 cm 9 km = 9 x 100 = 900 cm To convert kilometres to centimetres, multiply by 100.
1 kilometer = 100 000 centimeters, multiply 0.1 km to 100,000 and you'll get the answer.