The problem asks us to divide 1356 by 21 and then round the result to the nearest whole number.

1. Problem Description

The problem asks us to divide 1356 by 21 and then round the result to the nearest whole number.

2. Solution Steps

First, we perform the division: $1356 \div 21$.

Using a calculator, we find that $1356 \div 21 \approx 64.5714$.

Next, we round this result to the nearest whole number. Since the decimal part is $0.5714$, which is greater than or equal to $0.5$, we round up to the next whole number.

Thus, $64.5714$ rounded to the nearest whole number is $65$.

3. Final Answer

65