A car travels from City A to City B at 750 meters per minute, and it takes 80 minutes to arrive. When the car was just driving to the midpoint, the machine broke down and it took 10 minutes to repair it. If you want to arrive at the original time, how many meters per minute will the car be faster than before.
一辆汽车由甲城开往乙城，每分钟行750米，80分钟可以到达．当汽车正好行驶到中点时，机器发生故障，用10分钟修理完毕．如果要在原定的时间到达，后来汽车每分钟要比原来快多少米．
<gadget id="calculator">80 / 2</gadget>
<output>40</output>

<gadget id="calculator">750 * 40</gadget>
<output>30_000</output>

<gadget id="calculator">40 - 10</gadget>
<output>30</output>

<gadget id="calculator">30_000 / 30</gadget>
<output>1_000</output>

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

<result>250</result>