Please someone help me with a math problem? solving for how many seats total in a theater?

Help :( I tried to draw it out lol but its confusing me still

A theater has 11 seats in the first row. each row has 3 more seats than the row in front of it.

if the theatre has 35 rows, how many seats in total are in the theatre?

thank you for your help.
Update: really?? that was easy. (to the first answer)
Update 2: I figured the first answer couldn't be right lol.
Something wasn't making sense.

thanks.
4 answers 4