2*3.14*3.14*r=157

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Solution for 2*3.14*3.14*r=157 equation: 


Simplifying
2 * 3.14 * 3.14r = 157

Multiply 2 * 3.14
6.28 * 3.14r = 157

Multiply 6.28 * 3.14
19.7192r = 157

Solving
19.7192r = 157

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Divide each side by '19.7192'.
r = 7.961783439

Simplifying
r = 7.961783439

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