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
"When I considered what people generally want in calculating, I found that it always is a number."
"What is easiest is best in calculation."
"The unknown must be isolated to find its value."
"What is easiest and most useful in arithmetic, such as men frequently require in cases of inheritance, legacies, partition, lawsuits, and trade."
"The art of calculation is indispensable in commerce and daily life."