Conversation so far:
who was the highest paid president of the united states
Since 2001, the United States President's salary has been $400,000
which president of the united states had the highest networth
The richest president in history is Donald Trump, who is the first billionaire president. His net worth, however, is not known precisely because the Trump Organization is privately held.
what is president donald trump's estimate networth
By estimate, Trump is wealthier than all former presidents combined.

Question: how many dollars
Self-contained rewrite: what is president donald trump's estimate networth in us dollars