Task$-4$

Find the country with the highest population density $($population divided by surface area$).$

Output:

$\{\text{'}$capital$\text{'}$: $2454,$ 'cities': $[\{\text{'}$district$\text{'}$: 'Macau', $\text{'}\_$id$\text{'}$: $2454,$ 'name': 'Macao', 'population': $437500\}],\text{'}\_$id$\text{'}$: 'MAC', 'continent': 'Asia', $\text{'}$gnp$\text{'}$: $5749\mathrm{.}0,$ 'governmentForm': 'Special Administrative Region of China', 'headOfState': 'Jiang Zemin', 'lifeExpectancy': $81\mathrm{.}6,$ 'localName': 'Macau$/$Aomen$\text{'},$ 'name': 'Macao', 'population': $473000,$ 'region': 'Eastern Asia', 'surfaceArea': $30\mathrm{.}0\}$