To find the product of 12 and 6, we calculate:
\[ 12 \times 6 = 72. \]
Now, regarding the other numbers provided:
- 2.6307 - This is a rational number (as it can be expressed as a fraction).
- 4.1569 - This is also a rational number.
- 2.8867... - If it is a non-repeating, non-terminating decimal, it would be irrational. Otherwise, it could be rational (but typically, without further context, we'd consider repeating decimals as rational).
- 4.2974 - This is a rational number as well.
Given that the product, 72, is a whole number, it is classified as a rational number.
So, the product of 12 and 6 is 72, which is a rational number.