There are 457 boys and 369 girls in Yuren Primary School, and 680 of them have had physical examination. How many people have not yet had a physical examination?
育人小学有男生457人，女生369人，已经体检的有680人．还没有体检的有多少人？
<gadget id="calculator">369 - 680</gadget>
<output>-311</output>

<gadget id="calculator">457 + (-311)</gadget>
<output>146</output>

<result>146</result>