cuboid steel is 2.5 meters long, 0.4 meters wide, and 0.25 meters thick. It is known that the steel weighs 7800 kilograms per cubic meter. How many kilograms does this steel weigh?
一根长方体钢材，长2.5米，宽0.4米，厚0.25米，已知每立方米钢材重7800千克，这根钢材重多少千克？
<gadget id="calculator">2.5 * 0.4 * 0.25 * 7_800</gadget>
<output>1_950</output>

<result>1_950</result>