The answer will depend on what you wish to divide it by. If you wish to divide it by a variable, y, then the relevant expression is x/y.
You divide circumference / (2 x pi).You divide circumference / (2 x pi).You divide circumference / (2 x pi).You divide circumference / (2 x pi).
800 Divide by two. 400,2 Divide by two. 200,2,2 Divide by two. 100,2,2,2 Divide by two. 50,2,2,2,2 Divide by two. 25,2,2,2,2,2 Divide by five. 5,5,2,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 2 x 5 x 5 = 800
720 Divide by two. 360,2 Divide by two. 180,2,2 Divide by two. 90,2,2,2 Divide by two. 45,2,2,2,2 Divide by three. 15,3,2,2,2,2 Divide by three. 5,3,3,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 3 x 3 x 5 = 720
144 Divide by two. 72,2 Divide by two. 36,2,2 Divide by two. 18,2,2,2 Divide by two. 9,2,2,2,2 Divide by three. 3,3,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 3 x 3 = 144
1320 Divide by two.660,2 Divide by two.330,2,2 Divide by two.165,2,2,2 Divide by three.55,3,2,2,2 Divide by five.11,5,3,2,2,2 Stop.2 x 2 x 2 x 3 x 5 x 11 = 1320
Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).
x2 / x = x
Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).Just divide the circumference by (2 x pi).
Use a factor tree.360 Divide by two.180,2 Divide by two.90,2,2 Divide by two.45,2,2,2 Divide by three.15,3,2,2,2 Divide by three.5,3,3,2,2,2 Stop.2 x 2 x 2 x 3 x 3 x 5 = 360
588 Divide by two. 294,2 Divide by two. 147,2,2 Divide by three. 49,3,2,2 Divide by seven. 7,7,3,2,2 Stop. 2 x 2 x 3 x 7 x 7 = 588
80 Divide by two. 40,2 Divide by two. 20,2,2 Divide by two. 10,2,2,2 Divide by two. 5,2,2,2,2 Stop. 2 x 2 x 2 x 2 x 5 = 80
72 Divide by two. 36,2 Divide by two. 18,2,2 Divide by two. 9,2,2,2 Divide by three. 3,3,2,2,2 Stop. 2 x 2 x 2 x 3 x 3 = 72