Alice can fill Q cans of paint in 2 minutes. If there are R cans of paint in one gallon, how many gallons can Alice fill in 36 minutes?
Choose the correct choice from the following choices:
A) 36Q/R B) 18Q/R C) 18QR D) 18R/Q E) 36R/Q
Alice can fill this number of cans in 36 minutes:  (36/2)= 
<gadget id="calculator"> (36/2)</gadget>
<output>18</output>
18Q.   One can is 1/R gallons.   Alice can fill 18Q*(1/R)= 18Q/R gallons of paint in 36 minutes.   The answer is 18Q/R.
<result>B</result>
Alice can fill Q cans of paint in 2 minutes. If there are R cans of paint in one gallon, how many gallons can Alice fill in 36 minutes?