A factory used to produce 2,400 parts in 8 days, but now it produces 100 more parts per day than before, and now it produces 4,800 parts, how many days earlier than before?
某工厂原来8天生产零件2400个，现在每天比原来多生产100个，现在生产4800个零件，可比原来提前几天完成？
<gadget id="calculator">2_400 / 8</gadget>
<output>300</output>

<gadget id="calculator">4_800 / 300</gadget>
<output>16</output>

<gadget id="calculator">300 + 100</gadget>
<output>400</output>

<gadget id="calculator">4_800 / 400</gadget>
<output>12</output>

<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<result>4</result>