There are 18 boys and 17 girls in Class 4. What is the number of boys in the class?
四1班有男生18人，女生17人，男生是全班人数的多少
<gadget id="calculator">18 + 17</gadget>
<output>35</output>

<gadget id="calculator">18 / 35</gadget>
<output>18/35 = around 0.514286</output>

<result>18/35 = around 0.514286</result>