So one hectogram is 100 grams and a milligram is a thousandth of a gram.
So the order goes
Giga 10^9
Mega 10^6
Kilo 10^3
Hecta 10^2
Deca 10^1
deci 10^-1
centi 10^-2
mili 10^-3
micro 10^-6
nano 10^-9
So now go down the chart. How many places down are we going to get from hecta to mili? 5. Moving down, you move your decimal to the right, if you are moving up you move your decimal to the left. So we are moving down so we are going to move our decimal to the right 5 times.
And that gives us 457000 mg.
Hope I helped! If you have any other questions, need anymore help or want further explanation just let me know!! :)
