The fruit shop has 8207 kilograms of fruit. After selling some, there are 2502 kilograms left. How many kilograms are sold? (List the equations containing the unknown X, and then answer)
水果店有水果8207千克，卖出去一些后，还剩2502千克，卖出去多少千克？(列出含未知数X的等式，再解答)
<gadget id="calculator">8_207 - 2_502</gadget>
<output>5_705</output>

<result>5_705</result>