50g

Hello J, Here is the link to the training modules in the HP website:
http://h20331.www2.hp.com/hpsub/cache/383680-0-0-225-121.html

Also, when you get used to the calculator, you are going to need to 
toggle between exact mode (fractions) and approximate mode (decimal) to 
do this just  press and hold the [right-shift] key (orange key) and 
then press [ENTRER].