There are 7 tons in a barrel of oil, 2 tons of 460 kilograms were sold in the morning, and 4 tons of 4 kilograms were sold in the afternoon. How many tons are left? (calculated with decimals)
一桶油有7吨，上午卖了2吨460千克，下午卖了4吨4千克，还剩多少吨？(用小数计算)
<gadget id="calculator">7 - 2.46 - 4.004</gadget>
<output>0.536</output>

<result>0.536</result>