Among all the odd numbers from 1 to 2013, how many times does the number 3 appear?
在1至2013的所有奇数中，数字3共出现多少次．
<gadget id="calculator">2_010 / 10</gadget>
<output>201</output>

<gadget id="calculator">201 + 1</gadget>
<output>202</output>

<gadget id="calculator">2_000 / 100</gadget>
<output>20</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<gadget id="calculator">202 + 100 + 50</gadget>
<output>352</output>

<result>352</result>