James buys pistachios for $10 per can.  Each can is 5 ounces.  He eats 30 ounces of pistachios every 5 days.  How much does he spend on pistachios per week?
The pistachios cost 10/5=$<T>divide(10, 5)=2.0 per ounce
He eats 30/5=<T>divide(30, 5)=6.0 ounces of pistachios a day
So he spends 6*2=$<T>multiply(6, 2)=12 per day on pistachios
So he spends 12*7=$<T>multiply(12, 7)=84 per week
