Display resolution facts for kids
For example: a "640 by 480 display", which has 640 pixels from side to side and 480 from top to bottom (as in a VGA display), and therefore has a total number of 640 × 480 = 307,200 pixels or 0.3 megapixels, is what is meant by 640 × 480 display resolution.
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Display resolution Facts for Kids. Kiddle Encyclopedia.