40A*1.0235*1.5A=644.23

Solution for 40A*1.0235*1.5A=644.23 equation:

Simplifying
40A * 1.0235 * 1.5A = 644.23

Reorder the terms for easier multiplication:
40 * 1.0235 * 1.5A * A = 644.23

Multiply 40 * 1.0235
40.94 * 1.5A * A = 644.23

Multiply 40.94 * 1.5
61.41A * A = 644.23

Multiply A * A
61.41A2 = 644.23

Solving
61.41A2 = 644.23

Solving for variable 'A'.

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

Divide each side by '61.41'.
A2 = 10.4906367

Simplifying
A2 = 10.4906367

Take the square root of each side:
A = {-3.238925238, 3.238925238}