(1.3D)(0.7D)=

Solution for (1.3D)(0.7D)= equation:

Simplifying
(1.3D)(0.7D) = 0

Remove parenthesis around (1.3D)
1.3D(0.7D) = 0

Remove parenthesis around (0.7D)
1.3D * 0.7D = 0

Reorder the terms for easier multiplication:
1.3 * 0.7D * D = 0

Multiply 1.3 * 0.7
0.91D * D = 0

Multiply D * D
0.91D2 = 0

Solving
0.91D2 = 0

Solving for variable 'D'.

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

Divide each side by '0.91'.
D2 = 0

Simplifying
D2 = 0

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