It is stipulated that a⊙b=(a+b)/2, then what is 1996⊙2000=.
规定a⊙b=(a+b)/2，那么1996⊙2000=多少．
<gadget id="calculator">1_996 + 2_000</gadget>
<output>3_996</output>

<gadget id="calculator">3_996 / 2</gadget>
<output>1_998</output>

<result>1_998</result>