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?
Use reasoning to answer the following question.
80
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.

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The final answer: 80