How can one convert a pushdown automaton (PDA) to a context-free grammar (CFG)?

To convert a pushdown automaton (PDA) to a context-free grammar (CFG), you can create production rules based on the transitions of the PDA. Each state in the PDA corresponds to a non-terminal symbol in the CFG, and the transitions define the production rules. The start symbol of the CFG is the initial state of the PDA, and the final states of the PDA correspond to accepting states in the CFG.