Final answer:
Without a clear mathematical operation from the question, a general approach to multiplication is presented. Additionally, the formula for calculating magnification by a lens is provided in the case of optics-related problems.
Step-by-step explanation:
The question appears incomplete and doesn't present a clear mathematical operation or formula. However, I can provide a general approach to multiplication which seems to be implied:
- Identify the numbers you are multiplying.
- Line up the numbers by their decimal points if they have any.
- Multiply as if there were no decimal points.
- Count the number of digits after decimal points in the numbers you are multiplying.
- Place the decimal point in the answer such that the number of digits after the decimal point is equal to the sum of the decimal places in the numbers you multiplied.
Regarding magnification calculation for a lens, the formula is M = -D * d, where M is magnification, D is the power of the lens in diopters, and d is the distance from the lens to the object in meters. In this formula, negative magnification indicates an inverted image often seen in corrective lenses for myopia.