Jame gets a raise to $20 per hour and works 40 hours a week.  His old job was $16 an hour for 25 hours per week.  How much more money does he make per year in his new job than the old job if he works 52 weeks a year?
He makes 20*40=$<T>multiply(20, 40)=800 per week
He used to make 16*25=$<T>multiply(16, 25)=400 per week
So his raise was 800-400=$<T>subtract(800, 400)=400 per week
So he makes 400*52=$<T>multiply(400, 52)=20800 per year more
