When Xiao Ming calculated 3.1 divided by a number, because the decimal point of the quotient was one more to the right, the result was 25. What is the divisor of this equation.
小明在计算3.1除以一个数时，由于商的小数点向右多点了一位，结果得25．这道式题的除数是多少．
<gadget id="calculator">25 / 10</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">3.1 / (5/2)</gadget>
<output>1.24</output>

<result>1.24</result>