It is stipulated that "﹡" is an operation that satisfies a﹡b=((ab)/(a+b)), then, 2006﹡(2006﹡2006)=how much.
规定"﹡"为一种运算，它满足a﹡b=((ab)/(a+b))，那么，2006﹡(2006﹡2006)=多少．
<gadget id="calculator">2_006 * 2_006</gadget>
<output>4_024_036</output>

<gadget id="calculator">2_006 + 2_006</gadget>
<output>4_012</output>

<gadget id="calculator">4_024_036 / 4_012</gadget>
<output>1_003</output>

<gadget id="calculator">2_006 * 1_003</gadget>
<output>2_012_018</output>

<gadget id="calculator">2_006 + 1_003</gadget>
<output>3_009</output>

<gadget id="calculator">2_012_018 / 3_009</gadget>
<output>2_006/3 = around 668.666667</output>

<result>2_006/3 = around 668.666667</result>