2,500 kilograms of coal have been shipped from the cafeteria, and (3/5) has been used up. How many kilograms have been used?
食堂运来2500千克煤，已经用去了(3/5)，用去多少千克？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2_500 * (3/5)</gadget>
<output>1_500</output>

<result>1_500</result>