The fruit shop shipped (2/5) tons of fruit, after selling (4/5), how many tons are left?
水果店运来(2/5)吨水果，卖掉(4/5)后，还剩多少吨？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(2/5) * (1/5)</gadget>
<output>2/25 = around 0.08</output>

<result>2/25 = around 0.08</result>