To build a road, it is planned to build 50 meters per day, and it will be completed in 6 days. In fact, it will be repaired by 25 meters per day. How many days can it be completed in advance?
修一条路，计划每天修50米，6天修完，实际每天多修25米，可以提前几天修完？
<gadget id="calculator">50 + 25</gadget>
<output>75</output>

<gadget id="calculator">6 / 75</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">50 * (2/25)</gadget>
<output>4</output>

<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<result>2</result>