Dimension Analysis Problems

1 Pizza Party    
15 guests      
8 slices of pizza/pie    
Guest portion = 3 slices  
How many pies do you have to order?
2 Turbine coil wire    
12 coils are needed    
400 turns per coil    
each turn is 5 inches in length  
Each spool has 1000 ft of wire  
How many spools of wire must be ordered?