Conversation so far:
What year did Grace Hopper retire?
Following a career that spanned more than 42 years, Admiral Grace Hopper took retirement from the Navy on August 14, 1986.
Where did Grace Hopper work at?
Grace Brewster Murray Hopper was an American computer scientist and United States Navy rear admiral.

Question: What age was she?
Self-contained rewrite: What age was Grace Hopper when she retired?