Working
The calculator measures from the earlier date of birth to the later one: full calendar years first, then full months, then the remaining days.
14 Jun 1946 → 14 Jun 1969 = 23 years
14 Jun 1969 → 14 Apr 1970 = 10 months
14 Apr 1970 → 26 Apr 1970 = 12 days
Age gap = 23 years, 10 months and 12 days = 8,717 total days.