After a number is enlarged by 10 times, it is 22.05 more than the original number. What is the original number?
一个数扩大10倍后，比原来的数增加了22.05，原数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">22.05 / 9</gadget>
<output>2.45</output>

<result>2.45</result>