factory plans to produce 96 parts per day and complete the task in 20 days, but actually produces 24 more parts per day. How many days can the task be completed in advance? (Solve with ratio)
某工厂计划每天生产96个零件，20天完成任务，实际每天多生产24个，可以提前几天完成任务？(用比例解)
<gadget id="calculator">96 * 20</gadget>
<output>1_920</output>

<gadget id="calculator">24 * 20</gadget>
<output>480</output>

<gadget id="calculator">480 - 1_920</gadget>
<output>-1_440</output>

<gadget id="calculator">1_920 + (-1_440)</gadget>
<output>480</output>

<gadget id="calculator">96 + 24</gadget>
<output>120</output>

<gadget id="calculator">480 / 120</gadget>
<output>4</output>

<result>4</result>