bottle of juice contains (3/5) liters. Xinxin drank (1/4) liters on the first day and the rest (3/7) on the second day. How many liters of juice are left?
一瓶果汁有(3/5)升，欣欣第一天喝了(1/4)升，第二天喝了剩下的(3/7)，还剩下多少升果汁？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(7/20) * (4/7)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>