Wang Yong miscalculated △*0.8+0.4 as △*(0.8+0.4), and his result was 5.6 more than the correct number. What is the correct result?
王永把△*0.8+0.4误算成△*(0.8+0.4)，他得的结果比正确得数大5.6，正确结果是多少？
<gadget id="calculator">5.6 + 0.4</gadget>
<output>6</output>

<gadget id="calculator">6 / 0.4</gadget>
<output>15</output>

<gadget id="calculator">15 * 0.8</gadget>
<output>12</output>

<gadget id="calculator">12 + 0.4</gadget>
<output>12.4</output>

<result>12.4</result>