There are three departments in a local government. Department A has 40 civil servants, Department B has 28 civil servants, and Department C has 32 civil servants. If each department cuts off the personnel according to the same ratio, so that only 75 civil servants remain in this agency, then B How many civil servants are left in the department?
某地机关有三个部门，A部门有公务员40名，B部门有公务员28名，C部门有公务员32名，如果每个部门按相同比例裁剪人员，使这个机关仅留下公务员75人，那么B部门留下的公务员有多少名？
<gadget id="calculator">40 + 28 + 32</gadget>
<output>100</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">28 * (3/4)</gadget>
<output>21</output>

<result>21</result>