A=4*3.14r

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Solution for A=4*3.14r equation: 


Simplifying
A = 4 * 3.14r

Multiply 4 * 3.14
A = 12.56r

Solving
A = 12.56r

Solving for variable 'A'.

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

Simplifying
A = 12.56r

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