A window has 4 glass panels each. A house has 6 double windows downstairs and 8 single windows upstairs. How many glass panels are there in the whole house? Let's think first. Chain of thought:
There are 6 x 2 = 12 windows downstairs. There are 12 + 8 = 20 windows in the whole house. There are 20 x 4 = 80 glass panels in the whole house.
Therefore, the answer is 80.