One third is given by
and the half of this is
Now, just put 1 in the denominator of the number 2 and apply the sandwich rule:
then, one half of one third is equal to 1 over 6.
Now, in the calculator, you can type 1 divided by 3 and the result will be divided by 2. This operation will give you 0.1666666, which is equal to 1/6