The supermarket sold 15 boxes of apples today, totaling 3,000 kilograms. They were sold yesterday (4/5). How many kilograms were sold yesterday?
超市今天卖出苹果15箱，共3000千克，是昨天卖的(4/5)，昨天卖了多少千克？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">3_000 / (4/5)</gadget>
<output>3_750</output>

<result>3_750</result>