four-digit number whose ones digit is 8. If the ones digit is moved to the first place, the new four-digit number obtained is 168 more than four times the original four-digit number. What is the original four-digit number?
一个四位数，它的个位数字是8，把它的个位数字移到首位前，所得的新四位数比原四位数的4倍多168，原四位数是多少．
<gadget id="calculator">8 * 4</gadget>
<output>32</output>

<gadget id="calculator">8_000 - 32 - 168</gadget>
<output>7_800</output>

<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<gadget id="calculator">40 - 1</gadget>
<output>39</output>

<gadget id="calculator">7_800 / 39</gadget>
<output>200</output>

<gadget id="calculator">10 * 200</gadget>
<output>2_000</output>

<gadget id="calculator">2_000 + 8</gadget>
<output>2_008</output>

<result>2_008</result>