In the science and technology works competition held by the school, there are 108 entries in the sixth grade, which is more than that in the fifth grade (2/7). How many entries are there in the fifth grade?
在学校举行的科技作品大赛中，六年级的参赛作品有108件，比五年级多(2/7)，五年级的参赛作品有多少件？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 + (2/7)</gadget>
<output>9/7 = around 1.285714</output>

<gadget id="calculator">108 / (9/7)</gadget>
<output>84</output>

<result>84</result>