The number of people in the first workshop of a factory is 30 less than that of the second workshop (4/5). If 10 people are transferred from the second workshop to the first workshop, then the number of people in the first workshop is the number of people in the second workshop (3 /4). How many people were there in the second workshop?
某工厂第一车间的人数比第二车间的(4/5)少30人，如果从第二车间调10人的到第一车间，这时第一车间的人数是第二车间人数的(3/4)．第二车间原来有多少人？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">10 * (3/4)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">30 - 10 - (15/2)</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) - (3/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(25/2) / (1/20)</gadget>
<output>250</output>

<result>250</result>