When Carla was waiting on Monday she counted 38 ceiling tiles and on Tuesday she counted them twice, 38 ceiling tiles x 2 = <<38*2=76>>76 times she counted a ceiling tile.
She also counted 75 books in the room on Monday and counted them three times in a row on Tuesday, 75 books x 3 = <<75*3=225>>225 times she counted a book.
On Tuesday Carla counted the ceiling tiles 76 times + counted books 225 times = <<76+225=301>>301 times Carla counted something on Tuesday.
#### 301