What is the formula for converting frequency to approximate wavelength in meters?

The relationship between a radio wave's frequency and its wavelength is inversely proportional, linked by the speed of light. Because radio waves travel at approximately 300,000,000 meters per second in a vacuum, the fundamental formula is Wavelength (in meters) = 300,000,000 / Frequency (in Hertz). To make mental math easier, amateur radio operators simplify this equation by scaling it down by a factor of one million. By measuring the frequency in Megahertz (MHz) instead of Hertz, the 300,000,000 also shrinks to 300, resulting in the handy formula: Wavelength = 300 / Frequency in MHz. The distractors are incorrect because they either use the wrong mathematical operation (multiplying instead of dividing) or use the unscaled unit of Hertz with the scaled-down number 300, which would yield a mathematically impossible result.