Add a decimal point to a four-digit number, and then add it to the original number. The sum is 2028.08. What is the original four-digit number?
一个四位数，给它添上小数点后，再与原来的数相加，和是2028.08，原来的四位数是多少．
<gadget id="calculator">100 + 1</gadget>
<output>101</output>

<gadget id="calculator">2_028.08 / 101</gadget>
<output>20.08</output>

<gadget id="calculator">20.08 * 100</gadget>
<output>2_008</output>

<result>2_008</result>