Anthony T. answered 10/16/20
Patient Science Tutor
When doing problems of this type, write the conversion factor as a fraction with the desired unit in the numerator: 1000mm/1m. Multiply this conversion factor by the quantity to be converted, in this case 0.30m. The result will be the converted quantity in mm. Note that the meter unit will cancel out from numerator to denominator, leaving only mm as the unit.