A, B, and C process a batch of parts, A's processing accounts for (1/2) of the other two's total processing (1/2), B's processing accounts for the other two's total processing (1/3), and the remaining 300 parts are produced by After processing C, how many parts are there in this batch?
甲、乙、丙三人加工一批零件，甲加工的占其他两人加工总数的(1/2)，乙加工的占其他两人加工总数的(1/3)，剩下300个零件由丙加工完，这批零件一共有多少个？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/3) - (1/4)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">300 / (5/12)</gadget>
<output>720</output>

<result>720</result>