the division of 412 divided by 97 can be estimated as:
412 can be estimated as: 400
97 can be estimated to 100
so, now on dividing 400/100 we get, the answer as 4.
To verify the estimation: when 412 is divided by 97, the answer is 4.24 which can be nearly written as 4 only.
Thus, our estimation was correct.