There is a three-digit number, add a decimal point after one of its digits to get a decimal, then subtract the resulting decimal from the three-digit number, the result is 327.69, what is the three-digit number.
有一个三位数，在它的某位数字后面添上一个小数点，得到一个小数，再用这个三位数减去所得小数，结果是327.69，这个三位数是多少．
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">1 - (1/100)</gadget>
<output>99/100 = around 0.99</output>

<gadget id="calculator">327.69 / (99/100)</gadget>
<output>331</output>

<result>331</result>