The 10 grams of protein that most of us get from cereal and milk at breakfast, he added, is not enough to get the bodyâs muscle-building machinery working at full throttle. For that, we would need to eat about 25 to 30 grams of protein, the amount in a three-egg cheese omelet.
For example, the prefix kilo means times a thousand or one thousand of the units in question. So  kilometre means one thousand metres and kilogrammeans one thousand grams.
When referring to data transfer rates and hard disk drive storage size, kilobyte means 1000 (10^3) bytes. - Above is an example of what usually confuses people. There is another system with prefixes ending in 'bi' e.g. kibi 2^10, being used for binary whereas the other is used for decimal.