I think acceptable format is wrong. Simplifying_radicals

[pineapplehannah]

I must give my answer in the following format:

x√

The question is to simplify √144

which is 12
but because of the acceptable answer format, I can't answer "12"
I've watched the video, and used up all the hints, I've tried answering

1√144
and
3√16
and
4√9

Each time it says my answer is almost correct but needs to be simplified. This problem needs to have more hints!

It took me ages to figure out I could just type 12 in the first box, and leave the second box empty. This question needs to be more clear, or at least the acceptable answer format should see I can answer with an integer.