James takes a spinning class 3 times a week.  He works out for 1.5 hours each class and burns 7 calories per minute.  How many calories does he burn per week?
He works out for 1.5*60=<<1.5*60=90>>90 minutes per class
So he burns 90*7=<<90*7=630>>630 calories per class
That means he burns 630*3=<<630*3=1890>>1890 calories per week
#### 1890