Al-Khwarizmi — "The Hindus have a method of calculation which they call 'the nine figures'."
The Hindus have a method of calculation which they call 'the nine figures'.
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More from Al-Khwarizmi
"The root is the side of the square."
"The rule for solving equations is to balance them."
"The square of the unknown is equal to the number."
"The method of calculation must be clear and simple."
"The art of calculation is indispensable in commerce and daily life."