When the little sloppy was doing a multiplication problem of a three-digit number by a one-digit number, he mistakenly wrote the one-digit number 9 as 4, and the calculated product was 550 less than the correct product. Do you know what the correct calculation should be?
小马虎明明做一道三位数乘一位数的乘法题时，误把一位数9写成了4，结果算出来的积比正确的积少了550．你知道正确的计算结果应该是多少吗？
<gadget id="calculator">9 - 4</gadget>
<output>5</output>

<gadget id="calculator">550 / 5</gadget>
<output>110</output>

<gadget id="calculator">110 * 9</gadget>
<output>990</output>

<result>990</result>