There are 3 departments in a public institution. Department A has 84 staff members, Department B has 56 staff members, and Department C has 40 staff members. Now each department cuts down the staff according to the same ratio, and finally the whole organization will leave 150 staff members. Then A How many people have been laid off in the department?
一个事业机关有3个部门，A部门有工作人员84人，B部门有56人，C部门有40人，现在每个部门按相同的比例裁减人员，最终使整个机关留下150人，那么A部门裁减了多少人？
<gadget id="calculator">84 + 56 + 40</gadget>
<output>180</output>

<gadget id="calculator">150 / 180</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 - (5/6)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">84 * (1/6)</gadget>
<output>14</output>

<result>14</result>