There are 84 students in the fifth grade of Weimin Primary School. It is (4/25) of the total number of students in the school. The number of students in the sixth grade accounts for (4/15) of the total number of students in the school. How many students are there in grade six?
卫民小学五年级有学生84名．是全校学生总数的(4/25)．六年级学生人数占全校学生总数的(4/15)．六年级有多少学生？
<gadget id="calculator">4 / 25</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">84 / (4/25)</gadget>
<output>525</output>

<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">525 * (4/15)</gadget>
<output>140</output>

<result>140</result>