The piece is four times bigger than Manhattan Island in New York.

VOA: special.2010.08.14

"There's a yield potential of maybe four thousand kilos, ten times what the average is in West Africa."

VOA: special.2010.10.19

But its deficit is around four times the level permitted by the euro group.

VOA: special.2010.02.12

Greek debt,now estimated at 13 percent of its gross domestic output, is more than four times higher than the limit imposed by the European Union.

VOA: standard.2010.03.11