What is the sum of all digits in the product of 666...66*333...33? 2006 6, 2006 3.
666…66*333…33的积中所有数位上的数的和为多少．2006个6,2006个3．
<gadget id="calculator">2 * 2_005</gadget>
<output>4_010</output>

<gadget id="calculator">7 * 2_005</gadget>
<output>14_035</output>

<gadget id="calculator">4_010 + 1 + 14_035 + 8</gadget>
<output>18_054</output>

<result>18_054</result>