The fruit market shipped 4 tons of fruit, and after 7 days of selling, there were 12 kilograms left. How many kilograms of fruit are sold on average every day?
水果市场运来4吨水果，卖了7天后，还剩12千克．平均每天卖出多少千克水果？
<gadget id="calculator">4 * 1_000</gadget>
<output>4_000</output>

<gadget id="calculator">4_000 - 12</gadget>
<output>3_988</output>

<gadget id="calculator">3_988 / 7</gadget>
<output>3_988/7 = around 569.714286</output>

<result>3_988/7 = around 569.714286</result>