If two cars A and B start from A and B at the same time and go towards each other, they can meet on the way after 4 hours. It is known that the speed ratio of A and B is 5:6. According to this speed, if the two cars If cars want to meet at the midpoint between places A and B, how many hours should car B delay its departure?
甲、乙两车如果从A、B两地同时开出，相向而行，4小时后能在途中相遇，已知甲、乙两车速度的比是5：6，照这样的速度，如果两车要在A、B两地的中点处相遇，则乙车应延迟几小时开出？
<gadget id="calculator">5 + 6</gadget>
<output>11</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">22 / 5</gadget>
<output>22/5 = around 4.4</output>

<gadget id="calculator">22 / 6</gadget>
<output>11/3 = around 3.666667</output>

<gadget id="calculator">(22/5) - (11/3)</gadget>
<output>11/15 = around 0.733333</output>

<result>11/15 = around 0.733333</result>