Company Value calculation?

I'm not a finance or analysis guy. I tried to calculate value of company. Chat GPT was some help.
Using some old figures I made a calculations.

Production- 1,2 Mlbs
AISC- 42,46$
Uranium price contracted for selling - 75$
Annual Earnings- 1,2 Mlbs * (75$ - 42,46$) = 39 m$ - 7.8m$ tax = 31.2m$
14 years of production - 31,2m$ * 14 = 436 m$ income.

Very conservative approach can give us value of facility + resources for future mining + at least 436 m US$ income.
Now market cap is at 170 mUS$.

This company when everything goes well, can have market cap at minimum 400-500 mUS$.
260% more than today's cap.

Don't be mad at my silly analysis. If you can better, please share your analysis .