Of course, you also know about the multiples$-$based valuation

method. You would like to use this method to verify if your conclusion

regarding the overvaluation or undervaluation of XYZ is correct.

On

the stock exchange, companies that are comparable to XYZ $($including in terms of financing structure $($i$.$e$.$ relative debt level$))$ currently have a

Price$/$Earnings ratio of $9.$ XYZ$\text{'}$s current earnings are $400$ million USD and it $($still$)$ has $100$ million shares outstanding.

Based only on the information provided in this question, what is your estimate of the price of a share of XYZ in USD?