There are 120 boys in the fifth grade, 20 more than girls, and the number of girls is equal to the number of boys.
五年级男生120人，比女生多20人，女生人数相当于男生的多少．
<gadget id="calculator">120 - 20</gadget>
<output>100</output>

<gadget id="calculator">100 / 120</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>