How would you calculate total magnification for an image under a microscope?

To calculate the total magnification of an image under a microscope, you multiply the magnification of the objective lens by the magnification of the eyepiece (ocular lens). For example, if the objective lens has a magnification of 40x and the eyepiece is 10x, the total magnification would be 40x × 10x = 400x. This value indicates how many times larger the image appears compared to its actual size.