When Xiao Hua calculated 22 divided by a one-digit decimal, he left out the decimal point of the divisor, and the resulting quotient was 49.5 smaller than the original one. What is the divisor of this question.
小华在计算22除以一个一位小数时，把除数的小数点漏掉了，结果商比原来小49.5．这道题的除数是多少．
<gadget id="calculator">10 - 1</gadget>
<output>9</output>

<gadget id="calculator">49.5 / 9</gadget>
<output>5.5</output>

<gadget id="calculator">5.5 * 10</gadget>
<output>55</output>

<gadget id="calculator">22 / 55</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>