How is the voltage in a DC circuit calculated when the current and resistance are known?

The basic form of Ohm's Law states that the electromotive force, or voltage (E), is the product of the current (I) and the resistance (R). The formula is written as E = I x R. When both the current and the resistance are known quantities in a DC circuit, you simply multiply them together to find the total voltage. This represents the amount of electrical 'pressure' required to push that specific amount of current through that specific resistance. Any options suggesting you divide current by resistance, or vice versa, are incorrect algebraic rearrangements of Ohm's Law.