The transportation team transports a batch of chemical fertilizers, 75 tons per day, and can be completed in 20 days. Now it transports 50 tons more per day, how many days can it be completed in advance?
运输队运送一批化肥，每天运75吨，20天可以运完，现在每天多运50吨，可以提前几天完成？
<gadget id="calculator">75 + 50</gadget>
<output>125</output>

<gadget id="calculator">20 / 125</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">75 * (4/25)</gadget>
<output>12</output>

<gadget id="calculator">20 - 12</gadget>
<output>8</output>

<result>8</result>