Perform the multiplication. Give your answer in simplified form for radical expressions. 
Definitions:
CCF
An abbreviation for 100 cubic feet, commonly used as a measure for billing utility usage like water or natural gas.
Energy-Efficient
Describes products or services that use less energy to perform the same task or work as conventional products, reducing energy waste.
Gas Furnace
A heating system that uses natural gas as fuel to produce heat for residential or commercial spaces.
Oil Furnace
A heating device that uses oil as fuel to produce heat for warming a space.
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