To find the value of \( 8.1 \times 4.32 \), we can use the relationship between the multiplication of the numbers.
Since \( 81 \times 432 = 34,992 \), we can express \( 8.1 \) and \( 4.32 \) in terms of \( 81 \) and \( 432 \):
\[ 8.1 = \frac{81}{10} \] \[ 4.32 = \frac{432}{100} \]
Now, we calculate \( 8.1 \times 4.32 \):
\[ 8.1 \times 4.32 = \left( \frac{81}{10} \right) \times \left( \frac{432}{100} \right) = \frac{81 \times 432}{10 \times 100} = \frac{34,992}{1000} \]
Now, calculate \( \frac{34,992}{1000} \):
\[ \frac{34,992}{1000} = 34.992 \]
Therefore, the answer is:
34.992