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?
There are 6 x 2 = <<6*2=12>>12 windows downstairs
There are 12 + 8 = <<12+8=20>>20 windows in the whole house
There are 20 x 4 = <<20*4=80>>80 glass panels in the whole house
#### 80