A and B work together to process a batch of parts. When the processing is completed, A has processed 60% of the batch of parts and 30 more parts, which is exactly 3 times that of B. How many parts are there in this batch?
甲、乙两人共同加工一批零件，加工完毕时，甲加工了这批零件的60%多30个，正好是乙的3倍，这批零件有多少个？
<gadget id="calculator">30 + 90</gadget>
<output>120</output>

<gadget id="calculator">1.2 - 0.6</gadget>
<output>0.6</output>

<gadget id="calculator">120 / 0.6</gadget>
<output>200</output>

<result>200</result>