The figure shows a circular paper with one side folded inwards. The ratio of the area of the shaded part to the ratio of the unshaded part is 2 : 7. <hr> What is the area of the shaded part if the circle had a diameter of 28 cm? (Take π = $$\frac{22}{7}$$) <br> <input min="0" type="number" id ="imp6pg188q4_1" class="lineinput" placeholder="?" /> $$cm^2$$