Area of the blue shaded region ???

125.67cm^2

Explanation: area of a circle= πr^2

So the entire circle:
π(7)^2
=153.94

But the smaller circle is in the inside so we minus the area of that from the whole circles area.

Smaller circle area:
π(3)^2
=28.27

Therefore are of the blue shaded area:
=153.94-28.27
=125.67