There are 150 workers in the first workshop of a factory, and 90 workers in the second workshop. If the number of people in the first workshop is twice that of the second workshop, how many people need to be transferred from the second workshop to the first workshop?
某工厂第一车间有150人，第二车间有工人90人，要使第一车间的人数是第二车间的2倍，需要从第二车间调多少人到第一车间？
<gadget id="calculator">2 * 90</gadget>
<output>180</output>

<gadget id="calculator">180 - 150</gadget>
<output>30</output>

<gadget id="calculator">2 + 1</gadget>
<output>3</output>

<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<result>10</result>