Xiaohong's family raised 4 boxes of bees this year, collecting a total of 380 kilograms of honey. Last year, each box received an average of 84 kilograms of honey. How many kilograms is the average honey yield per box this year higher than last year?
小红家今年养了4箱蜜蜂，共收蜂蜜380千克，去年平均每箱收蜂蜜84千克．今年每箱平均产蜜量比去年高多少千克？
<gadget id="calculator">380 / 4</gadget>
<output>95</output>

<gadget id="calculator">95 - 84</gadget>
<output>11</output>

<result>11</result>