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?
First, we need to find the number of chairs in one set. There are 14 chairs in one set, so we can say that the number of chairs in one set is 14. 

Next, we need to find the number of sets of chairs. There are 12 sets of chairs, so we can say that the number of sets of chairs is 12. 

Now, we need to find the total number of chairs. The total number of chairs is 14 times 12, which is the same as 168. 

Finally, we need to find the number of extra chairs. There are 6 extra chairs, so we can say that the number of extra chairs is 6. 

Now, we need to find the total number of chairs for the guests. The total number of chairs for the guests is 168 plus 6, which is the same as 174. 

Therefore the answer (numeric) is: 

174