There are 1000 grams in a kilogram. How many grams is 2.25 kilograms?

Since we know that there are #1000# #"grams"# em uma #"kilogram"#, all we have to do is multiply the given measure in #"kilograms"# by #1000#.

So we should get:

#2.25*1000#

#=2250# #"grams"#