They decided to hold the party in their backyard. They have 12 sets of tables and each set has 14 chairs. There are also 6 chairs extra. How many chairs do they have for the guests?
There are 12 sets of tables and each set has 14 chairs. 

There are 12*14=168 chairs in total. 

There are 6 chairs extra. 

There are 168+6=174 chairs in total.