A factory has three workshops. The number of employees in the first and second workshops accounted for 65% of the total number of the three workshops, and the number of employees in the second and third workshops accounted for 75% of the total number of the three workshops. It is known that the second workshop has 70 employees, please calculate how many employees there are in the three workshops?
某工厂有三个车间．一、二车间职工人数占三个车间总人数的65%，二、三车间的职工人数占三个车间总人数的75%．已知二车间有职工70人，请你算一算三个车间一共有职工多少人？
<gadget id="calculator">65 / 100</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">75 / 100</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(13/20) + (3/4)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(7/5) - 1</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">70 / (2/5)</gadget>
<output>175</output>

<result>175</result>