The distance from Xiaofang's home to the school is 2000 meters. One morning, she rode a bicycle to school and walked 1200 meters in 6 minutes. At this time, she found that she had to arrive at school within 3 minutes, otherwise she would be late. So how much speed must be increased for the rest of the distance?
小芳家到学校的路程是2000米．一天早上，她骑车去学校，6分钟行了1200米，这时发现必须在3分钟内赶到学校，否则会迟到．那么剩下的路程必须把速度提高到多少？
<gadget id="calculator">2_000 - 1_200</gadget>
<output>800</output>

<gadget id="calculator">800 / 3</gadget>
<output>800/3 = around 266.666667</output>

<result>800/3 = around 266.666667</result>