Mom buys a watermelon and 12 apples, totaling 11 kilograms. The watermelon weighs 6.5 kilograms. How many kilograms does each apple weigh on average?
妈妈买回一个西瓜和12个苹果，共11千克，西瓜重6.5千克，平均每个苹果重多少千克？
<gadget id="calculator">11 - 6.5</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 / 12</gadget>
<output>0.375</output>

<result>0.375</result>