What is the quotient of the difference between 1 and (2/5) divided by the sum of 5.5 and 0.8?
1与(2/5)的差除5.5与0.8的和，商是多少？
<gadget id="calculator">5.5 + 0.8</gadget>
<output>6.3</output>

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

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6.3 / (3/5)</gadget>
<output>10.5</output>

<result>10.5</result>