The number of female workers in a workshop is 90% of the number of male workers. Due to work needs, 15 female workers were transferred in. At this time, the number of female workers is 20% more than the number of male workers. How many male workers are there in this workshop?
某车间女工人数是男工人数的90%，因工作需要，又调入女工15人，这时女工人数比男工人数多20%，这个车间有男工多少人？
<result>50</result>