Workers A and B each have to process 1,200 parts, and they start at the same time. After 2 hours, the ratio of the number of parts processed by worker A to those that have not been processed is 5:7, and worker B processes (2/5) of his own task. Who processed more parts and how many more?
甲、乙两个工人各要加工1200个零件，他们同时开始，2小时后甲工人已加工和未加工的零件数的比是5：7，乙工人加工自己任务的(2/5)，这时谁加工的零件多，多几个？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">1_200 / 12</gadget>
<output>100</output>

<gadget id="calculator">100 * 5</gadget>
<output>500</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1_200 * (2/5)</gadget>
<output>480</output>

<gadget id="calculator">500 - 480</gadget>
<output>20</output>

<result>20</result>