Question 103146
This is just simple! Don't be confused.
You can opt to use ratio and proportion like this:

1 ton:1000 kg::19500000 tons:x kg

By cross multiplication,

19500000000ton-kg=x ton-kg
                x=19500000000 kg

Therefore,
19.5 tons is equal to 19500000000 kg or 19.5 billion kilograms