When Lele calculated 1.47 plus a one-digit decimal, because he mistakenly aligned the end of the number, the resulting sum was 1.84. What is the one-digit decimal?
乐乐在计算1.47加上一个一位小数时，由于错误地把数的末尾对齐，结果得到的和是1.84，这个一位小数是多少．
<gadget id="calculator">1.84 - 1.47</gadget>
<output>0.37</output>

<gadget id="calculator">0.37 * 10</gadget>
<output>3.7</output>

<result>3.7</result>