Mom buys two packs of chocolates. Pack A contains 20 pieces. If you take out (1/4) and put them in Pack B, the ratio of the number of chocolate pieces in Pack A to Pack B is 3:5. How many pieces of chocolate are there in Pack B? ?
妈妈买回两包巧克力，甲包有20块，如果取出(1/4)放入乙包，这时甲包和乙包的巧克力块数的比是3：5，乙包原来有巧克力多少块？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">20 * (1/4)</gadget>
<output>5</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">15 / (3/5)</gadget>
<output>25</output>

<gadget id="calculator">25 - 5</gadget>
<output>20</output>

<result>20</result>