63÷1 is 63 because what is asking is how much will have more if we only give to one person we don't have to divide and you can't divide 5÷9 if we do that we gonna end up with 0.344 or something like that but you can divide 9÷5 which is 1.8 what is saying is if we take 9 and give to 5 person how much would all of them would get.
The area for a circle with a diameter of 8 cm is 50.24 cm². The area of a circle with a radius of 3 cm is 28.26 cm². 50.24 - 28.26 = 21.98 cm. So the difference is 21.98 cm.
