Xác định giá trị Tổng Sản phẩm Quốc nội (GDP) của quốc gia được xét tới. Tính tổng số giờ lao động của một quốc gia. Tính năng suất.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The GDP of a country is the measure of goods and services produced within a specific time period. You'll need that number to calculate productivity based on GDP.  You usually won't have to calculate the number yourself (that would be very difficult). Instead, you can find the number already calculated for you. You should be able to find the GDP of most countries online. Start by Googling the country's name plus "GDP". You can also find the GDP of many countries at the World Bank website.  Make s