There are 980 workers in a printing factory, among which male workers accounted for 4/5 of the total number of workers, and some female workers were transferred later. At this time, female workers accounted for 3/10 of the total number of workers, how many female workers were transferred people.
某印刷厂有工人980人，其中男工占全场工人数的(4/5)，后又调进一部分女工，这时女工占全场职工数的(3/10)，又调进女工多少人．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(4/5) / (7/10)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">980 * (8/7)</gadget>
<output>1_120</output>

<gadget id="calculator">1_120 - 980</gadget>
<output>140</output>

<result>140</result>