A bag of 1000g white rabbit toffee is placed on one side of the balance, and 5 apples and 2 bags of 100g chocolate are placed on the other side. The balance is just in balance. What is the weight of each apple?
天平的一边放了一袋1000克的大白兔奶糖，另一边放了5个苹果和2袋100克的巧克力，天平正好平衡，每个苹果重多少克．
<gadget id="calculator">100 * 2</gadget>
<output>200</output>

<gadget id="calculator">1_000 - 200</gadget>
<output>800</output>

<gadget id="calculator">800 / 5</gadget>
<output>160</output>

<result>160</result>