Xiaoli uses the vertical formula to calculate 8.1 plus a two-digit decimal, and treats the plus sign as a minus sign, and gets 2.67. What should be the correct result
小莉用竖式计算8.1加上一个两位小数，把加号看成了减号，得2.67．正确的结果应该是多少
<gadget id="calculator">8.1 - 2.67</gadget>
<output>5.43</output>

<gadget id="calculator">8.1 + 5.43</gadget>
<output>13.53</output>

<result>13.53</result>