Xiaohong, Xiaoying and their father go to the Children's Palace 1200 meters away. Xiaohong and Xiaoying walk 50 meters per minute, and their father rides a bicycle 250 meters per branch. But only one person can be brought each time, how many minutes can they go to the Children's Palace at the same time?
小红、小英和爸爸去1200米远的少年宫，小红、小英步行每分50米，爸爸骑车每分行250米．但每次只能带一人，他们最少几分钟可同时到少年宫？
<gadget id="calculator">250 / 50</gadget>
<output>5</output>

<gadget id="calculator">1_200 * 5 * 5</gadget>
<output>30_000</output>

<gadget id="calculator">1_200 * 5</gadget>
<output>6_000</output>

<gadget id="calculator">6_000 - 6_000 - 1_200</gadget>
<output>-1_200</output>

<gadget id="calculator">30_000 + (-1_200)</gadget>
<output>28_800</output>

<gadget id="calculator">250 * 5 * 2</gadget>
<output>2_500</output>

<gadget id="calculator">250 * 5 * 5</gadget>
<output>6_250</output>

<gadget id="calculator">250 * 5</gadget>
<output>1_250</output>

<gadget id="calculator">50 * 5 * 2</gadget>
<output>500</output>

<gadget id="calculator">1_250 - 500 - 1_250 - 250</gadget>
<output>-750</output>

<gadget id="calculator">2_500 + 6_250 + (-750)</gadget>
<output>8_000</output>

<gadget id="calculator">28_800 / 8_000</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">250 * (18/5)</gadget>
<output>900</output>

<gadget id="calculator">1_200 - 900</gadget>
<output>300</output>

<gadget id="calculator">300 / 50</gadget>
<output>6</output>

<gadget id="calculator">(18/5) + 6</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>