A cuboid oil tank, 2.5m long, 1.8m wide, 1.2m deep, has injected 3159kg of oil. If each cubic meter of oil weighs 780 kilograms, how many kilograms of oil can be filled into the oil tank?
一个长方体油槽，长2.5m，宽1.8m，深1.2m，已注入了石油3159千克．如果每立方米石油重780千克，那么油槽还可以注入石油多少千克？
<gadget id="calculator">2.5 * 1.8 * 1.2</gadget>
<output>5.4</output>

<gadget id="calculator">5.4 * 780</gadget>
<output>4_212</output>

<gadget id="calculator">4_212 - 3_159</gadget>
<output>1_053</output>

<result>1_053</result>