4 workers in the fan factory can install 80 fans in 5 hours. Now it is necessary to install 384 fans in 12 hours. How many more workers are needed?
电扇厂4名工人5小时能安装电扇80台，现在要在12小时内安装384台，需增加多少名工人．
<gadget id="calculator">80 / 4 / 5</gadget>
<output>4</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">384 / 48</gadget>
<output>8</output>

<gadget id="calculator">8 - 4</gadget>
<output>4</output>

<result>4</result>