A, B, and C jointly make a batch of parts. A makes (1/2) of B and C, B makes (1/3) of A and C, and C makes 25 pieces. What is the number of this batch of parts? how many?
甲、乙、丙合做一批零件，甲做的是乙、丙的(1/2)，乙做的是甲、丙的(1/3)，丙做了25个，问这批零件有多少个？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(1/2) / (3/2)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">(1/2) / (3/2) / (4/3)</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">25 / (5/12)</gadget>
<output>60</output>

<result>60</result>