After adding a decimal point to a four-digit number, add it to the original number, and the sum is 2013.94. What is the four-digit number.
一个四位数，给它加上小数点后，再与原数相加，和是2013.94．这个四位数是多少．
<gadget id="calculator">100 + 1</gadget>
<output>101</output>

<gadget id="calculator">2_013.94 / 101</gadget>
<output>19.94</output>

<gadget id="calculator">19.94 * 100</gadget>
<output>1_994</output>

<result>1_994</result>