Respuesta :

ABCtimetoplay

Answer:

418

Step-by-step explanation:

first row = 13 chairs

next 15 rows are 15 chairs each so

15 x 15= 225

the remaining rows are 10 and they have 3 extra chairs so 18 chairs and 10 remaining rows

10x 18=180

now add 13+225+180=418

hope this helps