Write the number 6 to the left of a four-digit number, and then add 8000 to the five-digit number obtained. The sum obtained is exactly 35 times the original four-digit number. What is the original four-digit number?
把数字6写到一个四位数的左边，再把所得的五位数加上8000，所得的和正好是原来四位数的35倍，原来的四位数是多少．
<gadget id="calculator">35 - 1</gadget>
<output>34</output>

<gadget id="calculator">68_000 / 34</gadget>
<output>2_000</output>

<result>2_000</result>