To estimate \( 7.523 \div 4.23 \), we can round the numbers to make the division simpler.
Rounding \( 7.523 \) to \( 8 \) and \( 4.23 \) to \( 4 \):
Now we estimate:
\[ 8 \div 4 = 2 \]
Thus, the estimated result of \( 7.523 \div 4.23 \) is approximately \( 2 \).
So, among the options provided (2, 3, 6, or 4), the closest estimate is 2.