Congcong bought a set of jigsaw puzzles with the 20 yuan allowance from his mother, and used up (3/5). How much is this set of jigsaw puzzles?
聪聪用妈妈给的20元零花栈买了一套拼图，用去了(3/5)，这套拼图多少钱？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">20 * (3/5)</gadget>
<output>12</output>

<result>12</result>