There are 10 millimeters in one centimeter, therefore 720 millimeters is equal to 720 / 10 = 72 centimeters.
One decimeter is equal to 10 centimeters, therefore 72 decimeters is equal to 72 x 10 = 720 centimeters.
Therefore, 72 decimeters is ten times longer a measure than 720 millimeters.
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