Lantian Primary School held a handicraft exhibition, 80 of which were not in the third grade, and 50 were not in the fourth grade. A total of 42 pieces were exhibited by the third and fourth graders. How many pieces were exhibited by other grades?
蓝天小学举办手工制品展览，其中有80件不是三年级的，有50件不是四年级的，三、四年级参展的一共有42件，其他年级参展的作品共有多少件？
<gadget id="calculator">50 - 42</gadget>
<output>8</output>

<gadget id="calculator">80 + 8</gadget>
<output>88</output>

<gadget id="calculator">88 / 2</gadget>
<output>44</output>

<result>44</result>