When Xiaojing calculated 4.95 divided by a number, because the decimal point of the quotient was one more to the right, the result was 22.5. What is the divisor of this equation.
小晶在计算4.95除以一个数时，由于商的小数点向右多点了一位，结果得22.5．这道式题的除数是多少．
<gadget id="calculator">4.95 / 2.25</gadget>
<output>2.2</output>

<result>2.2</result>