Thomas Fuller was an African man born around 1710 in what is now Benin (West Africa). When he was just 14 years old, he was captured and sold into slavery. In 1724, he was brought to Virginia, USA, where he spent the rest of his life working on a plantation.
Even though he never learned to read or write, Thomas had an extraordinary gift for mathematics. He could solve very difficult math problems entirely in his head, much faster than most educated people could do on paper. Because of this amazing ability, people called him the “Virginia Calculator.”
His Famous Math Feats
Thomas’s talent became widely known when visitors came to see him demonstrate his mental math skills. One of the most famous stories about him goes like this:
One day, some men wanted to test his ability. They asked him:
“How many seconds are there in a year and a half?”
Thomas thought quietly for about two minutes and then replied:
“47,304,000 seconds.”
The men checked his answer later — and he was exactly right!
Then they gave him another, even harder question:
“How many seconds has a man lived if he is 70 years, 17 days, and 12 hours old?”
After thinking for only a minute and a half, Thomas said:
“2,210,500,800 seconds.”
One of the men who had been doing the calculation on paper said that Thomas was wrong, and that the answer should be smaller. But Thomas immediately replied:
“Top, massa, you forget de leap year.”
(He meant: “Stop, sir, you forgot to count the leap years.”)
When they added the leap years into the calculation, they found that Thomas’s answer was exactly correct!
Legacy
Thomas Fuller’s story spread across the colonies and even reached Europe. Many people were amazed that someone who had been denied an education could perform such advanced calculations. He became a symbol of natural intelligence and human potential, especially among enslaved Africans who were often wrongly thought to be inferior.
Thomas Fuller died in 1790, but his name is still remembered today. His life reminds us that genius and talent know no boundaries — not of race, education, or circumstance.

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