231=3.1416*R^2*14

Solution for 231=3.1416*R^2*14 equation:

Simplifying
231 = 3.1416R2 * 14

Reorder the terms for easier multiplication:
231 = 3.1416 * 14R2

Multiply 3.1416 * 14
231 = 43.9824R2

Solving
231 = 43.9824R2

Solving for variable 'R'.

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

Add '-43.9824R2' to each side of the equation.
231 + -43.9824R2 = 43.9824R2 + -43.9824R2

Combine like terms: 43.9824R2 + -43.9824R2 = 0.0000
231 + -43.9824R2 = 0.0000

Add '-231' to each side of the equation.
231 + -231 + -43.9824R2 = 0.0000 + -231

Combine like terms: 231 + -231 = 0
0 + -43.9824R2 = 0.0000 + -231
-43.9824R2 = 0.0000 + -231

Combine like terms: 0.0000 + -231 = -231
-43.9824R2 = -231

Divide each side by '-43.9824'.
R2 = 5.25210084

Simplifying
R2 = 5.25210084

Take the square root of each side:
R = {-2.291746242, 2.291746242}