The Jianxin Fruit Wholesale Department has newly shipped 1 ton of fruit and sold 900 kilograms. The rest will be sold out in 2 days. How many kilograms should be sold on average per day?
建新水果批发部新运进1吨水果，已经卖出900千克，剩下的要2天卖完，平均每天应卖多少千克？
<gadget id="calculator">1_000 - 900</gadget>
<output>100</output>

<gadget id="calculator">100 / 2</gadget>
<output>50</output>

<result>50</result>