There are 378 boys and 346 girls in the first grade of Chenguang Primary School. There are 398 people who have checked their bodies, how many people have not checked their bodies?
晨光小学一年级有男生378人，女生346人．已经检查身体的有398人，没检查身体的有多少人？
<gadget id="calculator">378 + 346</gadget>
<output>724</output>

<gadget id="calculator">724 - 398</gadget>
<output>326</output>

<result>326</result>