На каждую машину погрузили 20 бочек бензина, по 190 л в каждой. Сколько всего литров бензина погрузили на 5 машин?

20 • 190 • 5 = 190 • (20 • 5) = 190 • 100 = 19 000.

Hi Emmy,
I'm writing on your advertisement about a new dancing school. I’m interested in joining your school, but I would like to find out more details about it.
The first thing I need to know is what days you have classes and at what time. It’s really important to me as I’m a full-time student and have to attend my school too!
Could you also let me know how many students you have in a group? And certainly I would like to know the prices. Should I pay for a week, a month or for the whole course?
You also mentioned that you provide the students with the essential equipment. What exactly will I get for free and what items will I have to buy myself?
Best regards,
Anna

The first speaker believes that hobbies are unnecessary. People choose hobbies because they are safer than real life. However hobbies take too much time, and having fun is just a waste of time.
The second speaker is sure that people should learn how to have fun. They shouldn't worry too much, work too much. They should enjoy their life.
Перевод:
Первый говорящий верит, что хобби неважны. Люди выбирают хобби, потому что это безопасней реальной жизни. Однако хобби занимают так много времени, а получение удовольствий это просто трата времени.
Второй говорящий уверен, что людям следует учиться тому, как веселиться. Им не следует слишком много беспокоиться. Им следует наслаждаться своей жизнью.