Table:
text: East Asia
Demographics
Demographics
Country Area_km² Population Population_density_per_km² HDI_2011 Capital
China (PRC) 9640011 1339724852 138 0.699 Beijing
Hong Kong (PRC) 1104 7061200 6390 0.898 Hong Kong
Japan 377930 127950000 337 0.901 Tokyo
Macau (PRC) 30 556800 18662 No Data Macau
Mongolia 1564100 2809600 2 0.653 Ulaanbaatar
North Korea 120538 24346000 198 No Data Pyongyang
South Korea 100210 48988833 500 0.897 Seoul

Question: Which capital cities in East Asia have an area of exactly 377930 square kilometers?

Question: What is the total number of capitals from the list of East Asia that have an area of exactly 1104 square kilometers?

Question: Which capital in East Asia has exactly 1339724852 inhabitants?

Question: How many ethnic groups in East Asia have a Hong Kong capital?