How old was george f richards when George Albert Smith was born?

What was the age (length of time since creation) of George Franklin Richards (February 23, 1861 - August 8, 1950), the member of the Quorum of the Twelve Apostles of The Church of Jesus Christ of Latter-day Saints (LDS Church) from April 9, 1906 until his death at the time George Albert Smith, Sr. (April 4, 1870 - April 4, 1951), the eighth president of The Church of Jesus Christ of Latter-day Saints (LDS Church) is born on (has as his or her date of birth)?

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I followed this chain of reasoning:

I know from locally stored knowledge that:
April 4th 1870 is the birthdate of George Albert Smith ([fact: ["18941209@trueknowledge.com"]])

February 23rd 1861 is the birthdate of George Franklin Richards ([fact: ["125293301@trueknowledge.com"]])

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 9 years, 1 month and 12 days old is the age of George Franklin Richards

Fact 1 is true at April 4th 1870

By calculation (generator: ["applies_at_timepoint@trueknowledge.com"]) I know that:
Fact 1 is true at April 1870

By calculation (generator: ["human_age@trueknowledge.com"]) I know that:
Fact 1: 9 years, 1 month and 12 days old is a age

Fact 1: 9 years, 1 month and 12 days old applies to George Franklin Richards

Fact 1 is true at April 4th 1870

By calculation (generator: ["ismoreaccurate1@trueknowledge.com"]) I know that:
April 4th 1870 is a more accurate version of April 1870

I used the following facts to provide this answer:

April 4th 1870 is the birthdate of George Albert Smith

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February 23rd 1861 is the birthdate of George Franklin Richards

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