Multiply the number of dekameters by 10,000 to convert to millimeters. For example, if you have 0.88 dam, multiply 0.88 by 10,000 to get 8,800 mm.
Divide the number of dekameters by 0.00001 to convert to millimeters. In this example, divide 0.88 by 0.00001 to verify your answer of 8,800 mm.
Verify your answer with an online dekameter-to-millimeter converter. Enter the number of dekameters and the equivalent number of millimeters will be displayed.