placing the 4 next to the ruler and rod numbered 1 to the left, and then we would proceed as
before.
The square root of 137641 is 371. If we start the calculation procedure the first digit is 3 so we
place the rod numbered 6 next to the ruler. Going ahead, the second digit turns out to be 7. So we
move the 6 rod one box to the left and put the 14 rod. The 4 goes next to the ruler and the 1 rod
should now go on the left but there is already a rod there, numbered 6 so instead we put the rod
numbered 6 + 1, 7, i.e. the sum of the two rods that should be in that position.