For a bottle of (5/2) liter drink, first fill 4 large cups, each cup is (2/5) liter, and then pour the rest into 6 small cups on average. How many liters are poured into each small cup?
一瓶(5/2)升的饮料，先倒满4大杯，每杯(2/5)升，再把剩下的平均倒进6个小杯里．每个小杯倒进多少升？
<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 4</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(5/2) - (8/5)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">(9/10) / 6</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>