Adding two 0s at the end of an integer makes it 891 larger than the original number. What is the original number?
在一个整数的末尾添上两个0，比原数大891，原来的数是多少？
<gadget id="calculator">100 - 1</gadget>
<output>99</output>

<gadget id="calculator">891 / 99</gadget>
<output>9</output>

<result>9</result>