First find the total sticks from the chairs: 6 sticks/chair * 18 chairs = <<6*18=108>>108 sticks
Then find the total sticks from the tables: 9 sticks/table * 6 tables = <<9*6=54>>54 sticks
Then find the total sticks from the stools: 2 sticks/table * 4 stools = <<2*4=8>>8 sticks
Then add up the total number of sticks she gets: 108 sticks + 54 sticks + 8 sticks = <<108+54+8=170>>170 sticks
Then divide the total number of sticks by the number of sticks she burns per hour to find the total number of hours she can keep warm: 170 sticks / 5 sticks/hour = <<170/5=34>>34 hours
#### 34