user: Question: What is the land area of switzerland with a population density fewer than 188 km²?
Columns: ['Country', 'Population (July 2005 est.)', 'Land Area (km²)', '% of arable land (2005 est.)', 'Arable Land (km²)', 'Population Density (pop per km²)']
Types: ['text', 'real', 'real', 'text', 'real', 'real']
Sample row: ['World', 6447437283.0, 148940000.0, '13.31%', 19823914.0, 43.0]
SQL:

assistant: SELECT "Land Area (km²)" FROM "Table" WHERE "Country" = 'switzerland' AND "Population Density (pop per km²)" < 188.0;