There are 100 sixth graders in a certain school, which is 20 less than the total number of students in the school (3/8). Find out how many students there are in the whole school. What is the column
某校六年级学生有100人，比全校总人数的(3/8)少20人，求全校有多少人．列式为多少
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">120 / (3/8)</gadget>
<output>320</output>

<result>320</result>