When Xiao Liang was doing decimal addition calculations, he regarded the addend 4.18 as 4.81, and the result was 20. What is the correct result.
小亮在进行小数加法计算时，把加数4.18看成了4.81，得到的结果是20．正确的结果是多少．
<gadget id="calculator">20 - 4.81</gadget>
<output>15.19</output>

<gadget id="calculator">15.19 + 4.18</gadget>
<output>19.37</output>

<result>19.37</result>