There are 26 countries in South America and, in each country, there are 5 cities with 1000 people living in each city.  If the whole population lives in these cities, how many people are there in South America?
How many cities are there in all the 26 countries? ** Since each country has 5 cities, then in all the 26 countries, there are 26*5 = <<26*5=130>>130 cities.
How many people are there in all the cities? ** If each city has 1000 people, then the 130 cities have 130*1000 = 130000
#### 130000