History of Hindu Mathematics: A Source Book v1.c8.s6.46

v1.c8.s6.46

To square 125. The number is written down 125 The square of the digit in the least place, *i.e.*, 5²=25 is set over it thus: 25 125 Then, 2 × 5 = 10 is placed below the other digits, and five is rubbed out, thus: 25 12 10 Multiplying by 10 the rest of the digits, *i.e.*, 12, and setting the product over them (the digits), we have 1225 12 10 Then rubbing out 10 which is not required and moving the rest of the digits, *i.e.*, 12, we have 1225