How many 20-yuan renminbi can be exchanged for 6 pieces of 50-yuan renminbi?
6张50元的人民币可以兑换多少张20元的人民币．
<gadget id="calculator">6 / 20</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">50 * (3/10)</gadget>
<output>15</output>

<result>15</result>