The difference between the two numbers obtained by moving the decimal point of a decimal to the right and left by one bit is 2.2. This number is expressed as a fraction.
一个小数的小数点分别向右向左移动一位得到的两数之差是2.2，这个数用分数表示为多少．
<gadget id="calculator">10 - 0.1</gadget>
<output>9.9</output>

<gadget id="calculator">2.2 / 9.9</gadget>
<output>0.222222</output>

<result>0.222222</result>