4.47 x 10^1 g How wouldI convert this to nanmograms?

Question

would I use 1mg / 10^-9 g? I do not understand how to do this

Answer 1

Note that nanogram means 10^(-9) g
So
4.47 x 10^1 g
=4.47*10^10 × 10^1*10^(-10) g
=4.47×10^10 ng