It is stipulated that "※" is a new operation, which satisfies a※b=((ab)/(a+b)), then, 2013※(2013※2013)=how much.
规定"※"是一种新运算，它满足a※b=((ab)/(a+b))，那么，2013※(2013※2013)=多少．
<gadget id="calculator">2_013 / 2</gadget>
<output>2_013/2 = around 1_006.5</output>

<gadget id="calculator">2_013 * (2_013/2)</gadget>
<output>4_052_169/2 = around 2_026_084.5</output>

<gadget id="calculator">2_013 + (2_013/2)</gadget>
<output>6_039/2 = around 3_019.5</output>

<gadget id="calculator">(4_052_169/2) / (6_039/2)</gadget>
<output>671</output>

<result>671</result>