Marco loves trading cards. He has a total of 500 cards on hand, and a fourth of them are duplicates. Marco decides to trade one-fifth of these duplicates for completely new cards to his friend Josh. How many new cards did Marco get?
Marco has 500*0.25=
<gadget id="calculator">500*0.25</gadget>
<output>125</output>
125 duplicate trading cards.
He wants to trade off 125*0.2=
<gadget id="calculator">125*0.2</gadget>
<output>25</output>
25 cards for new ones.

<result>25</result>