There is a column of decimals 2.41, 41.3, 3.51, 51.4, 4.61..., starting from the second number, each number is obtained by exchanging the decimal part and the integer part of the previous number and adding 0.1, when the number of a certain number When 0 appears for the first time, do not continue, and find the sum of this sequence.
有一列小数2.41，41.3，3.51，51.4，4.61…，从第二个数开始，每个数都是它前一个数的小数部分和整数部分互换后加0.1所得，当某一个数的数字中首次出现0时，不再继续，求这个数列的和．
<gadget id="calculator">2.41 + 41.3 + 3.51 + 51.4 + 4.61 + 61.5 + 5.71 + 71.6 + 6.81 + 81.7 + 7.91 + 91.8 + 8.01</gadget>
<output>438.27</output>

<result>438.27</result>