A construction site needs to transport 7860 kg of cement. After transporting it 9 times, there is still 660 kg left to be transported. How many kilograms are shipped on average?
某工地要运7860千克水泥，运了9次后，还剩下660千克没有运完．平均每次运多少千克？
<gadget id="calculator">7_860 - 660</gadget>
<output>7_200</output>

<gadget id="calculator">7_200 / 9</gadget>
<output>800</output>

<result>800</result>