The number of female workers in a workshop is 30 fewer than the number of male workers, and the ratio of male to female workers is 5:3. How many female workers are there?
一个车间女职工人数比男职工人数少30人，男女职工人数之比是5：3，女职工有多少人．
<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">15 * 3</gadget>
<output>45</output>

<result>45</result>