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?
How many marbles did Cindy give to her friends? ** Cindy gave her four friends 80 marbles each, a total of 4*80 = <<80*4=320>>320 marbles
How many marbles did Cindy have left? ** She was left with 500-320 = <<500-320=180>>180 marbles
What's four times the number of marbles she has remaining? ** Four times the number of marbles she has remaining is 180*4 = <<180*4=720>>720
#### 720