Okay kiddo, let me explain to you what the first deputy prime minister of Russia is. So, you know how a family has a head, which is usually the dad, right? Well, a country also has a head, called the prime minister. The prime minister is like the dad of a country, and he is responsible for making sure everything runs smoothly.
Now, sometimes the prime minister needs help with all the work he has to do. That's where the first deputy prime minister comes in. Think of the first deputy prime minister as the big brother of the family, who helps the dad take care of everything.
The first deputy prime minister is the second most powerful person in the country after the prime minister. He helps him with important decisions, and has a say in how the country should be run. He also takes care of different parts of the government, like the economy, education, and health care.
So, basically, the first deputy prime minister is like a really important helper to the prime minister. He makes sure everything is running smoothly, and helps keep the country on track.