No you don't multiply the 4 numbers you take radius times radius
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they multiply to a product
you multiply the two numbers before the =. ex. 4x8=. the 4 and the 8 are the numbers you multiply another is 6x9=. the 6 and the 9 are the numbers you multiply.
Multiply the radius by 2 to get the diameter. Then multiply the diameter by pi to get the circumference. Example: If radius = 2 inches, diameter = 4 inches circumference = 4 x pi = 4 (3.1416) or about 12.57 inches
4x4x4x2
Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.Multiply the diameter by the number pi - approximately 3.14.