Here's why:
* Metric prefixes represent powers of 10. For example, "kilo" represents 1000 (10^3), "milli" represents 0.001 (10^-3), and so on.
* To use a metric prefix, you multiply the base unit by the corresponding power of 10.
* 1 kilometer = 1 * 10^3 meters
* 1 milligram = 1 * 10^-3 grams
Therefore, metric prefixes are essentially shorthand for multiplying by powers of 10, simplifying calculations and making it easier to work with very large or very small quantities.
