The African man who was sold to slavery during the salve trade erra,was later discovered to be very calculative as to be compered with the scientific calculator,
This man's name is Thomas Fuller, he was sold at the age of 14 and was known as a man who could solve complex problems with his head just in few seconds,sometimes he give answers in two minutes of a question been thrown to him. You can make more research such as to know more.
0.030 SRY