Many different five-digit numbers can be formed from the five numbers 0, 0, 1, 2, and 3. What is the average of all these five-digit numbers?
由0，0，1，2，3五个数码可以组成许多不同的五位数，所有这些五位数的平均数为多少．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">10_000 * 12</gadget>
<output>120_000</output>

<gadget id="calculator">2 + 3</gadget>
<output>5</output>

<gadget id="calculator">5 * 3_333</gadget>
<output>16_665</output>

<gadget id="calculator">120_000 + 16_665</gadget>
<output>136_665</output>

<gadget id="calculator">20_000 * 12</gadget>
<output>240_000</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">4 * 3_333</gadget>
<output>13_332</output>

<gadget id="calculator">240_000 + 13_332</gadget>
<output>253_332</output>

<gadget id="calculator">30_000 * 12</gadget>
<output>360_000</output>

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

<gadget id="calculator">3 * 3_333</gadget>
<output>9_999</output>

<gadget id="calculator">360_000 + 9_999</gadget>
<output>369_999</output>

<gadget id="calculator">136_665 + 253_332 + 369_999</gadget>
<output>759_996</output>

<gadget id="calculator">4 * 3 * 3</gadget>
<output>36</output>

<gadget id="calculator">759_996 / 36</gadget>
<output>21_111</output>

<result>21_111</result>