When the little sloppy calculated 16.2 divided by a decimal, he forgot to convert the divisor into an integer, but he calculated according to the division of an integer, and the result was 0.45. The original divisor has one decimal place, what should it be?
小马虎在计算16.2除以一个小数时，忘记把除数转化为整数，他却按照除数是整数的除法计算，结果得0.45．原来的除数有一位小数，它应该是多少？
<gadget id="calculator">16.2 / 0.45 / 10</gadget>
<output>3.6</output>

<result>3.6</result>