A batch of parts is processed by workshop A in 5 hours, and workshop B in 7 hours. Now the two workshops cooperate for 2 hours, and there are still 198 pieces that have not been processed. How many parts can be processed by workshop B within the cooperation time?
一批零件甲车间加工5小时完成，乙车间7小时完成，现由两个车间合作2小时，还剩下198件没加工，求合作时间内乙车间加工零件多少件？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">(1/5) + (1/7)</gadget>
<output>12/35 = around 0.342857</output>

<gadget id="calculator">(12/35) * 2</gadget>
<output>24/35 = around 0.685714</output>

<gadget id="calculator">1 - (24/35)</gadget>
<output>11/35 = around 0.314286</output>

<gadget id="calculator">198 / (11/35)</gadget>
<output>630</output>

<gadget id="calculator">(1/7) * 2</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">630 * (2/7)</gadget>
<output>180</output>

<result>180</result>