Ben works 8-hour shifts in a furniture shop.  It takes him 5 hours to build 1 rocking chair.  How many chairs can he build in 10 days?
He works 8 hours a day for 10 days means he works 8*10 = <<8*10=80>>80 hours
It takes him 5 hours to build one rocking chair so over 80 hours he builds 80/5 = <<80/5=16>>16 rocking chairs
#### 16