Table:
text: List of Italian Presidents by longevity
Italian Presidents' ages
Italian Presidents' ages
President Date_of_inauguration Age_at_inauguration End_of_term Length_of_retirement Lifespan
Enrico De Nicola Category:Articles with hCards 1January1948 70years, 53days 12May1948 days days (81years, 326days)
Luigi Einaudi Category:Articles with hCards 12May1948 74years, 49days 11May1955 days days (87years, 220days)
Giovanni Gronchi Category:Articles with hCards 11May1955 67years, 243days 11May1962 days days (91years, 37days)
Antonio Segni Category:Articles with hCards 11May1962 71years, 98days 6December1964 days days (81years, 303days)
Giuseppe Saragat Category:Articles with hCards 29December1964 66years, 101days 29December1971 days days (89years, 266days)
Giovanni Leone Category:Articles with hCards 29December1971 63years, 56days 15June1978 days days (93years, 6days)
Sandro Pertini Category:Articles with hCards 9July1978 81years, 287days 29June1985 days days (93years, 152days)

Question: How long is the presidential retirement with inauguration age of 70 years, 53 days in the list of Italian presidents by longevity?