cone concentration

Hello, does anyone know how to work this out when ever I do it I always get o.65% but the answer is 0.6% and idk why? Thank you


The retina of the human eye has an area of approximately 1.094 × 103 mm2
The circular fovea in a human eye has a diameter of 3 × 103 µm
Calculate the area of the fovea as a percentage of the area of the retina.
The area of a circle is πr
2
. Use π = 3.14 in your calculation.
Show your working.