324•326

To calculate \( 324 \times 326 \), you can use the difference of squares formula, which states that \( (a - b)(a + b) = a^2 - b^2 \).

Here, we can express it as:

• Let \( a = 325 \) (the average of 324 and 326)
• Let \( b = 1 \) (the difference from 325)

Using the formula:

\[ 324 \times 326 = (325 - 1)(325 + 1) = 325^2 - 1^2 \]

Now we calculate \( 325^2 \):

\[ 325^2 = 105625 \]

So:

\[ 324 \times 326 = 105625 - 1 = 105624 \]

Thus, \( 324 \times 326 = 105624 \).