a right circular cylinder has a diameter of 5.7 inches and a height of 6.4 feet

a.) what is the volume of the cylinder in ft^3?

b.) what is the volume of the cylinder in cubic metres?

c.)what is the volume of the cylinder in litres?

so for ft^3 i knew that

the volume of a cylinder is (pi)r^2*h

so i did 2.85in.^2 * 6.4ft

v= 51.984 ft^3 is this correct?

and how do i do the other ones?^