...they make no use of tables; but only of the addition, subtraction, multiplication, and division of certain numbers, of which we do not presently discern the ground, nor to what these numbers refer.
Notes from Wikiquote
A new historical relation of the Kingdom of Siam, ... 1693 by La Loubere, Simon de. | quoted in : Bhaskar Kamble, The Imperishable Seed: How Hindu Mathematics Changed the World and why this History was Erased, Garuda Prakashan Private Limited, 2022 ISBN 9798885750189