Provide your best answer for the following math problem. 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 problem is: how can a cake ( circular ) be cut into 8 pieces by making just 3 cuts ?
21'
There is no solution. A circle cannot be cut into 8 equal pieces using only 3 cuts.