Grandpa Wang has 4 cows at home and needs to feed 291.2 kg of concentrated feed for 7 days. How many kg of concentrated feed does each cow need to feed every day?
王爷爷家养4头奶牛，7天共需喂精饲料291.2千克，每头奶牛每天需喂精饲料多少千克？
<gadget id="calculator">291.2 / 4 / 7</gadget>
<output>10.4</output>

<result>10.4</result>