Piano, Bass Cleft, Treble Cleft, and C cleft?

I just started learning how to read music and play the piano. I know what Bass and Treble Cleft notes are but on this score that I am reading, in the middle of the song where a Bass or Treble cleft would be there is a giant C, on both the right and left hand. What does that mean? The notes are as follows A,... show more I just started learning how to read music and play the piano. I know what Bass and Treble Cleft notes are but on this score that I am reading, in the middle of the song where a Bass or Treble cleft would be there is a giant C, on both the right and left hand. What does that mean?

The notes are as follows A, G, A (A), G on the right hand.
On the left hand it is F, C, F

The song I am trying to learn how to play in River Flows in you by Yiruma. It is on the second page in the middle. That's where those C's are. Help! Thanks!
3 answers 3