Guangming Primary School used to have 10 fewer boys than girls. This year, the school has added 50 boys and 42 girls. What is the difference between boys and girls now?
光明小学原来男生比女生少10人，今年学校增加了50个男生，42个女生，现在男生和女生相差多少人．
<gadget id="calculator">50 - 42</gadget>
<output>8</output>

<gadget id="calculator">10 - 8</gadget>
<output>2</output>

<result>2</result>