Suppose a and b are two different numbers from natural numbers 1 to 1007, then what is the maximum value of (a+b)/(ab)
设a和b是自然数1～1007中的两个不同的数，那么(a+b)/(a-b)的最大值是多少
<gadget id="calculator">1_007 + 1_006</gadget>
<output>2_013</output>

<gadget id="calculator">1_007 - 1_006</gadget>
<output>1</output>

<gadget id="calculator">2_013 / 1</gadget>
<output>2_013</output>

<result>2_013</result>