factory has three workshops, the first workshop has 48 workers, the second workshop has 72 workers, and the third workshop has 90 workers. If each workshop cuts off workers in the same proportion, the factory will only have 140 workers. How many workers should be left in the third workshop?
某工厂有三个车间，第一车间有工人48人，第二车间有工人72人，第三车间有工人90人，如果每个车间按相同的比例裁员，让这个工厂只留下工人140人，问第三车间应留下工人多少？
<gadget id="calculator">48 + 72 + 90</gadget>
<output>210</output>

<gadget id="calculator">140 / 210</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">90 * (2/3)</gadget>
<output>60</output>

<result>60</result>