You are comparing "market caps" and "enterprise value".
If the company has four billion dollars cash in the bank, then the value would be four billion plus whatever the business itself is worth as a business. If the business itself is only worth 400 million, then you would have 4.4bn market caps and 400 million enterprise value. The "enterprise value" is basically how much the business would be worth if it had no cash or no debt.
These numbers would be a very unusual situation. It could happen for example if a big company has sold 90% of its business for cash. When you buy a share of the company, you get a tiny share of the business and you own a tiny share of the cash. This stock will very likely keep its value, but won't make much money.
On the other hand, more common would be a company where the business is worth 4bn, but the company has also 4bn debt. So it is worth exactly zero. Market caps close to zero, but enterprise value $4bn, because you ignore the debt in the enterprise value.
Edit: Sorry, got the "enterprise value" totally wrong, read millions instead of billions: Your numbers would mean that you have a huge, huge company with close to 440bn debt. Most likely someone made a mistake here. A "normal" situation would be say a company with a business that is worth $500 million, but they have $100 million debt, so market caps = $400 million but enterprise value = $500 million.
PS. Yahoo has the same nonsense numbers on their UK site, and for other companies (I just checked Marks and Spencer's which apparently has an enterprise value of 800 billion pound with a totally ridiculous P/E ratio.