When Xiaoli used a calculator to calculate an addition formula, she left out the decimal point of one of the addends 1.3. The calculated result was 15.64. What is the correct result?
小丽在用计算器计算一道加法算式时，把其中一个加数1.3的小数点漏掉了，算得的结果是15.64，正确的结果是多少？
<gadget id="calculator">15.64 - 13</gadget>
<output>2.64</output>

<gadget id="calculator">2.64 + 1.3</gadget>
<output>3.94</output>

<result>3.94</result>