Schoolgirl Valentina does not like mathematics and is afraid of the school principal, Yuri Mikhailovich, who teaches this subject. After all, he gave her a bad grade again, and now dad will be angry, nervous, and won’t take her to the circus on Sunday. What should I do? In search of a way out, the girl made many mistakes and, it seems, was completely confused. How everything was resolved, the reader will find out at the end of this instructive life story. It turns out that if people treat each other with trust and understanding, no mathematics is scary.