Master Zhang and Master Li jointly process 200 parts. Master Zhang processes 1 part every 4 minutes, and Master Li processes 1 part every 6 minutes. Then, when they finished processing this batch of parts together, how many parts did Master Zhang process?
张师傅、李师傅共同加工200个零件，张师傅每4分钟加工1个零件，李师傅每6分钟加工1个零件，那么他们共同加工完这批零件时，张师傅加工了多少个零件．
<gadget id="calculator">3 + 2</gadget>
<output>5</output>

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

<gadget id="calculator">200 * (3/5)</gadget>
<output>120</output>

<result>120</result>