Explanation

Multiply the digits and rearrange them according to the pattern.

For 4 x 5 = 1620, the pattern is 4 * 5 = 20 and 4 + 5 = 9.

Apply the same pattern to 3 x 8 and 7 x 6.

Here's the calculation:

For 3 x 8: 3 * 8 = 24 and 3 + 8 = 11, so it becomes 924.

For 7 x 6: 7 * 6 = 42 and 7 + 6 = 13, so it becomes 4942.