1. A machine-implemented method for efficiently solving for a desired parameter of a system or device that can include both electrically large elements operating at relatively higher frequencies, and electrically small elements operating at relatively lower frequencies, comprising the steps of: (a) setting up the system or device as a predefined structure that enables a solution for the desired parameter to be determined, the predefined structure including a plurality of elements, wherein the plurality of elements may include: (i) electrically large elements, but not electrically small elements; (ii) electrically small elements, but not electrically large elements; or (iii) both electrically large elements and electrically small elements; (b) executing an iterative solver that determines a first matrix vector product for any electrically large elements, and a second matrix vector product for any electrically small elements that are included in the system or device; (c) logically combining the matrix vector products for the electrically large elements and the electrically small elements, and determining a net delta for a combination of the matrix vector products; (d) iteratively repeating steps (b) and (c) as necessary, until a subsequent net delta has been determined that is within a predefined limit; (f) once a subsequent net delta has been determined that is within the predefined limit, employing said matrix vector products that were last determined to obtain a solution for the desired parameter; and (g) presenting the solution for the desired parameter to a user in a tangible form.