A canteen plans to burn 2,400 kilograms of coal, but the actual savings are (1/5) compared to the plan. How many kilograms of coal are actually burned?
某食堂计划烧煤2400千克，实际比计划节约(1/5)，实际烧煤多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2_400 * (4/5)</gadget>
<output>1_920</output>

<result>1_920</result>