with a speed of 4 kilometers per hour chases B with a speed of 3 kilometers per hour. When the distance between the two is 0.5 kilometers, a bee starts to fly back and forth between the two of them from A's hat until A catches up with B. If the bee speed is 10 Kilometers, how many kilometers did the bee fly?
时速4千米的A追赶时速3千米的B，两人相距0.5千米时，有一只蜜蜂从A的帽子上开始来回在两人中间飞，只飞到A追及B为止，若蜜蜂时速10千米，问蜜蜂飞了多少千米？
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">0.5 / 1</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 * 10</gadget>
<output>5</output>

<result>5</result>