There are 421 boys and 528 girls in the first grade of Chenguang Primary School. There are 299 people who have checked their bodies, how many people have not checked their bodies?
晨光小学一年级有男生421人，女生528人．已经检查身体的有299人，没检查身体的有多少人？
<gadget id="calculator">528 - 299</gadget>
<output>229</output>

<gadget id="calculator">421 + 229</gadget>
<output>650</output>

<result>650</result>