Heather Mills has walked away from her four-year marriage to Paul McCartney with a $48.6 million divorce settlement — an enormous sum, but a fifth of what she had sought and a fraction of the former Beatle's $800 million fortune.

Heather Mills AP PHOTO

Mills declared herself "very, very, very pleased" March 17 — but some legal experts were surprised she did not get more.

"In the scheme of things, it's quite surprisingly low," said Patricia Hollings, a divorce specialist with London law firm Finers Stephens Innocent. "It is only offering her about 6 percent of his assets. In terms of high-wealth cases it's very low."

Mills' jackpot is only about half of the biggest contested divorce settlement in British history — the $90 million that insurance tycoon John Charman was ordered to pay his ex-wife in 2006.