If x% of y is the same as 4/5 of 80, then the value of xy is?  Select:
A) 4250  B) 6205  C) 5260  D) 4852  E) 6400
x/100 * y = 4/5 * 80= 
<gadget id="calculator">4/5 * 80</gadget>
<output>64</output>
64*100= 
<gadget id="calculator">64*100</gadget>
<output>6_400</output>
6400   Answer is 6400
<result>E</result>
If x% of y is the same as 4/5 of 80, then the value of xy is?