When Xiaohu calculated 3.86 plus a decimal, he mistakenly aligned the end of the number and got 4.29. What is the correct result of this question?
小虎在计算3.86加上一个一位小数时，由于错误地把数的末尾对齐，结果得到4.29，那么这道题正确结果是多少．
<gadget id="calculator">4.29 - 3.86</gadget>
<output>0.43</output>

<gadget id="calculator">0.43 * 10</gadget>
<output>4.3</output>

<gadget id="calculator">4.3 + 3.86</gadget>
<output>8.16</output>

<result>8.16</result>