Jim reads at a rate of 40 pages an hour.  He reads a total of 600 pages per week.  He increases his reading speed to 150% of its former speed but reads 4 hours less per week.  How many pages does he read a week now?
He read 600/40=<T>divide(600, 40)=15.0 hours per week
So now he reads 15-4=<T>subtract(15, 4)=11 hours per week
She now reads 40*1.5=<T>multiply(40, 1.5)=60.0 pages per hour
So she reads 11*60=<T>multiply(11, 60)=660 pages per week
