There are 8 bags of soybeans and 8 bags of peanuts in the warehouse, with a total weight of 640 kg. It is known that each bag of soybeans weighs 45 kg. How much does each bag of peanuts weigh?
仓库有黄豆和花生各8袋，共重640千克，已知黄豆每袋重45千克，花生每袋重多少千克？
<gadget id="calculator">640 / 8</gadget>
<output>80</output>

<gadget id="calculator">80 - 45</gadget>
<output>35</output>

<result>35</result>