The ratio of students in grades 4, 5 and 6 of Chengbei Primary School is 2:3:4, and 25% of the students in grade 6 are transferred. At this time, there are 320 students in grades 4, 5 and 6. How many students are there in Grade 5 of Chengbei Primary School?
城北小学四五六年级的人数比是2：3：4，六年级转走25%学生，这时四五六人数一共有320人，问城北小学五年级有多少人？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">4 * (1/4)</gadget>
<output>1</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">2 + 3 + 3</gadget>
<output>8</output>

<gadget id="calculator">320 / 8</gadget>
<output>40</output>

<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<result>120</result>