2(3.14)r(2r)=

Solution for 2(3.14)r(2r)= equation:

Simplifying
2(3.14) * r(2r) = 0

Remove parenthesis around (2r)
2 * 3.14r * 2r = 0

Reorder the terms for easier multiplication:
2 * 3.14 * 2r * r = 0

Multiply 2 * 3.14
6.28 * 2r * r = 0

Multiply 6.28 * 2
12.56r * r = 0

Multiply r * r
12.56r2 = 0

Solving
12.56r2 = 0

Solving for variable 'r'.

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

Divide each side by '12.56'.
r2 = 0

Simplifying
r2 = 0

Take the square root of each side:
r = {0}