There are a total of 630 students in Hongguang Primary School, of which the sixth grade accounts for (1/7), which is less than the fifth grade (1/4). How many students are there in the fifth grade?
红光小学一共630名学生，其中六年级占(1/7)，比五年级少(1/4)，五年级有多少人？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">630 * (1/7)</gadget>
<output>90</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">90 / (3/4)</gadget>
<output>120</output>

<result>120</result>