A factory has three workshops, the number of people in the first workshop is (1/2) the number of people in the second and third workshops, the number of people in the second workshop is (1/3) the number of people in the first and third workshops, and the number of people in the third workshop is 105 , Find the total number of workers in the factory.
某工厂有三个车间，第一车间的人数是第二、三车间人数的(1/2)，第二车间的人数是第一、三车间人数的(1/3)，第三车间有105人，求该厂工人总数．
<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">105 / (5/12)</gadget>
<output>252</output>

<result>252</result>