is it really that low in calories?

I went to the organic store today and bought these whole wheat noodles. The ingredients say it's made out of whole wheat flour, sea salt and filtered water. It tasted all right.. a bit like salty flour.

The thing I'm confused about these noodles is its calories. Each pack provides four squares (each square is one 55 gram serving) of noodles and each square is only 81 calories???? Is it even possible for noodles to have such few calories?