Problem 45209. An Ohm's Law Calculator

BACKGROUND / MOTIVATION:

Many important observations in math and science can be described by short, but powerful, equations:

 * The Pythagorean Theorem (c^2 = a^2 + b^2)
 * Newton's Second Law of Motion (F = ma)
 * Einstein's Mass-Energy Equivalence (E = mc^2)

For electrical circuits, one of the most useful and important equations is:

 * Ohm's Law (V = IR)

Ohm's Law describes the relationship between voltage (V), current (I), and resistance (R) in electrical circuits.

For more information, check out: https://www.build-electronic-circuits.com/ohms-law/

PROBLEM DESCRIPTION:

Given the current (I) through a resistor with resistance (R), create a function that will return the voltage (V) across the resistor.