A man loves to go hiking.  He knows that he has to pack about .5 pounds of supplies for every mile he hikes.  He plans to go for a very long hike.  He knows that he can get 1 resupply during the hike that will be 25% as large as his first pack.  He can hike at a rate of 2.5 mph.  He is going to hike 8 hours a day for 5 days.  How much does he need to bring with his first pack?
He is going to hike 8*=40 hours
That means he will be hiking for 40*2.5=<T>multiply(40, 2.5)=100.0 miles
So he needs 100*.5=<T>multiply(100, 0.5)=50.0 pounds of supplies
With the resupply he can get up to 1+.25=<T>add(1, 0.25)=1.25 times his initial pack
That means his initial pack has to weigh 50/1.25=<T>divide(50, 1.25)=40.0 pounds
