The distance between A and B is 800 meters. A and B start from A and B at the same time. If they are walking towards each other, they will meet each other in 4 minutes; if they are walking in the same direction, A can catch up with B in 50 minutes. How many minutes does it take A to get from A to B?
A、B两地相距800米，甲、乙两人分别从A、B两地同时出发．若相向而行，4分钟相遇，若同向而行，50分钟甲可以追上乙．甲从A地到B地要用多少分钟？
<gadget id="calculator">800 / 4</gadget>
<output>200</output>

<gadget id="calculator">800 / 50</gadget>
<output>16</output>

<gadget id="calculator">200 + 16</gadget>
<output>216</output>

<gadget id="calculator">216 / 2</gadget>
<output>108</output>

<gadget id="calculator">800 / 108</gadget>
<output>200/27 = around 7.407407</output>

<result>200/27 = around 7.407407</result>