The first reason why i think willow is smart is because she said the equation pi out loud up to seven because she likes that number. This shows how smart she is. This example fits because it is showing how smart she is. That is why i think she is smart.
Another reason why i think willow is smart is that she passed a special test that everyone failed and she was the only one to ever pass it with a really good grade. Even the principle thought she cheated on the test so then she had to prove to him that she didn’t cheat by saying pi.
Another example is that she kind of looks down