There are 100 female workers and 20 male workers in workshop A. It is known that 3/5 of the number of workers in workshop A is 15 fewer than the number of workers in workshop B. How many workers are there in workshop B?
甲车间有女职工100人，男职工20人，已知甲车间的人数的3/5比乙车间的人数少15人，乙车间有职工多少人？
<gadget id="calculator">100 + 20</gadget>
<output>120</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 * (3/5)</gadget>
<output>72</output>

<gadget id="calculator">72 - 15</gadget>
<output>57</output>

<result>57</result>