Найдите значение выражения 7*10^log по основанию 10 от 3

1.    What was the indication that the father came back from work?2.    What did the main character was looking for in her room?3.    What was her ultimate desire after she closed the door?4.    How do the parents’ demands affect the character?5.    Why did the family quarrel until dinner?

[latex]7*10^{log_{10}3}=7*3=21[/latex]