If "&" is a new operation symbol and satisfies a&b=((ba)/(ab)), then 1&2+2&3+3&4+…+9&10=how much.
若"&"为一种新的运算符号，且满足a&b=((b-a)/(ab))，则1&2+2&3+3&4+…+9&10=多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<result>9/10 = around 0.9</result>