Processing a batch of parts, A and B can complete it in 24 hours. First, A will do it for 16 hours, and then B will do it for 12 hours. (2/5) of the remaining parts of this batch have not been completed. It is known that A processes more than B every day by 3 parts, ask: How many parts are there in this batch?
加工一批零件，甲乙合做24小时可以完成，先由甲做16小时，然后乙再做12小时，还余下这批零件的(2/5)没有完成，已知甲每天比乙多加工3个零件，问：这批零件有多少个？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(1/24) * 12</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (2/5) - (1/2)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<gadget id="calculator">(1/10) / 4</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(1/24) - (1/40)</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(1/40) - (1/60)</gadget>
<output>1/120 = around 0.008333</output>

<gadget id="calculator">3 / (1/120)</gadget>
<output>360</output>

<result>360</result>