Note the total duration of the nakshatra in which a person is born. Find how many Ghatikas and Vighatikas are yet to pass after the time of birth. Divide this by the total duration in Ghatikas and Vighatikas. Multiply the product by the number of years allotted to the planet governing that nakshatra. This gives the number of years still to be experienced by the native in that Dasa. The remainder is to be converted into months and days.