When Xiao Li used the vertical formula to calculate 5.1 plus a two-digit decimal, he regarded the plus sign as a minus sign, and got 2.76. Ask him what the correct result should be.
小李用竖式计算5.1加上一个两位小数时，把加号看成了减号，得2.76．请问他的正确结果应该是多少．
<gadget id="calculator">5.1 - 2.76</gadget>
<output>2.34</output>

<gadget id="calculator">5.1 + 2.34</gadget>
<output>7.44</output>

<result>7.44</result>