Three workers process a batch of parts together, A processes (1/2) of this batch of parts per hour, B processes (1/3) of this batch of parts per hour, and C processes (1/4) of this batch of parts per hour ; After 1 hour, the three people processed a total of 156 parts. How many parts are there in the batch of parts that are required to be processed?
三个工人一起加工一批零件，甲每小时加工这批零件的(1/2)，乙每小时加工这批零件的(1/3)，丙每小时加工这批零件的(1/4)；1小时后三人一共加工了156个零件，求要求加工的那批零件原来有多少个？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

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

<gadget id="calculator">(1/2) + (1/3) + (1/4)</gadget>
<output>13/12 = around 1.083333</output>

<gadget id="calculator">156 / (13/12)</gadget>
<output>144</output>

<result>144</result>