When Xiao Liang used the vertical formula to calculate 5.1 minus a two-digit decimal, he regarded the minus sign as a plus sign and got the result 7.76. What is the correct result?
小亮用竖式计算5.1减一个两位小数时，把减号看成了加号得到结果7.76，正确的结果是多少
<gadget id="calculator">7.76 - 5.1</gadget>
<output>2.66</output>

<gadget id="calculator">5.1 - 2.66</gadget>
<output>2.44</output>

<result>2.44</result>