To produce a batch of parts, A can make 20 parts per hour, and B can do it alone for 16 hours. Now A and B are doing it at the same time. The quantity ratio is 3:5, how many parts does A produce in total?
生产一批零件，甲每小时可做20个，乙单独做要16小时，现甲、乙两人同时做，生产期间，甲因修理机床停工两小时，完成任务时，甲、乙生产零件的数量之比为3：5，甲一共生产多少个零件？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 16</gadget>
<output>1/16 = around 0.0625</output>

<gadget id="calculator">(5/8) / (1/16)</gadget>
<output>10</output>

<gadget id="calculator">10 - 2</gadget>
<output>8</output>

<gadget id="calculator">20 * 8</gadget>
<output>160</output>

<result>160</result>