Janna sleeps 7 hours each day during weekdays and 8 hours each day during weekends. How many hours does she sleep in a week?
She sleeps 7*5=<<7*5=35>>35 hours on weekdays.
She sleeps 8*2=<<8*2=16>>16 hours on weekends.
35 + 16 = <<35+16=51>>51 hours is the amount of time she sleeps in a week.
#### 51