###Human: Out of the 500 marbles that Cindy had, she gave her four friends 80 marbles each. What's four times the number of marbles she has remaining?, ### Assistant: Cindy gave her four friends 80 marbles each, a total of 4*80 = 320 marbles
She was left with 500-320 = 180 marbles
Four times the number of marbles she has remaining is 180*4 = 720 
 So the answer is :  720