When copying some exercises about multiplying two numbers, Xiao Hua wrote one of the numbers 45 as 54 by mistake. As a result, the answer he got was 198 times greater than the correct answer. What is the correct answer to this multiplication problem?
在抄写某两个数相乘的习题时，小华将其中一个数45误写为54，结果他所得到的答案比正确答案大198．这个乘法习题的正确答案为多少．
<gadget id="calculator">54 - 45</gadget>
<output>9</output>

<gadget id="calculator">198 / 9</gadget>
<output>22</output>

<gadget id="calculator">45 * 22</gadget>
<output>990</output>

<result>990</result>