Human: 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? Assistant: 
How many minutes does James work out for each class? ** He works out for 1.5*60=<<1.5*60=90>>90 minutes per class
How many calories does James burn per class? ** So he burns 90*7=<<90*7=630>>630 calories per class
How many calories does James burn per week? ** That means he burns 630*3=<<630*3=1890>>1890 calories per week
#### 1890