Last year, Uncle Wang harvested 6 bags of sorghum, weighing 330 kg in total, and 9 bags of corn, weighing 720 kg in total. On average, how many kilograms does each sack of corn weigh more than each sack of sorghum?
王大伯去年收6袋高粱，共重330千克，收9袋玉米，共重720千克．平均每袋玉米比每袋高梁重多少千克？
<gadget id="calculator">720 / 9</gadget>
<output>80</output>

<gadget id="calculator">330 / 6</gadget>
<output>55</output>

<gadget id="calculator">80 - 55</gadget>
<output>25</output>

<result>25</result>