Hi, I've started what I think is geometry... ^^' and I'm stumbling at this first practical question. Any help is really appreciated!

A panel of glass is 180cm^{2}, 80cm^{2}of bue glass and 80cm^{2 }of clear glass.

How many panels are needed if the blue glass used covers an area of 4.48m^{2}?

I thought convert cm to metres so 80/100 = 0.8m^{2}and then 4.48m^{2}/0.8m^{2}= 5.6panels, but the books answer is 560 panels are needed. What do I not understand?

Thank you