For a number, the difference between the decimal part and the integer part is 4.46. If the decimal part is enlarged by 4 times to get 2.16, then what is the decimal number?
一个数，小数部分与整数部分的差是4.46，如果把小数部分扩大4倍得2.16，那么这个小数是多少．
<result>5.46</result>