car travels from A to B at 750 meters per minute and is expected to arrive in 50 minutes. But when the car travels to (3/5) distance, something breaks down, and it takes 5 minutes to repair it. If it still needs to arrive at B within the scheduled time. How many meters per minute must the car travel the rest of the distance.
一辆汽车从甲地开往乙地，每分钟行750米，预计50分钟到达．但汽车行驶到(3/5)路程时，出了故障，用5分钟修理完毕，如果仍需要在预定时间内到达乙地．汽车行驶余下的路程时，每分钟须比原来快多少米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">750 * 50 * (2/5)</gadget>
<output>15_000</output>

<gadget id="calculator">50 * (2/5)</gadget>
<output>20</output>

<gadget id="calculator">20 - 5</gadget>
<output>15</output>

<gadget id="calculator">15_000 / 15</gadget>
<output>1_000</output>

<gadget id="calculator">1_000 - 750</gadget>
<output>250</output>

<result>250</result>