Provide your best answer for the following question. Give ONLY the answer, no other words or explanation.
For example:

Answer: <most likely answer, as short as possible; not a complete sentence, just the answer!>.

The question is: If a chemical reaction such as photosynthesis begins with 6 atoms of carbon [C], how many atoms of carbon [C] should be in the products?
6 atoms of carbon [C]
6 or 12 [depending on the formula used for the products]