When I was doing an addition formula, I mistook the 3 in the unit digit of the first addend as 6, and the 1 in the tens digit of the second addition as 4, so the sum obtained was more than the original more or less? How much does the wrong sum differ from the correct sum?
小粗心在做一道加法算式时，把第1个加数个位上的3看成了6，把第2个加数十位上的1错看成了4，这样得到的和比原来变多了还是变少了？错误的和与正确的和相差了多少？
<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">6 - 3</gadget>
<output>3</output>

<gadget id="calculator">30 + 3</gadget>
<output>33</output>

<result>33</result>