There is a train carriage with a length of 9 meters, a width of 2.5 meters, and a height of 2 meters. It is filled with coal. If each cubic meter of coal weighs 1.4 tons, how many tons of coal are there in this carriage?
有一节火车的车厢，长是9米，宽是2.5米，高是2米，里面装满了煤，如果每立方米煤重1.4吨，那么这节车厢装满煤有多少吨？
<gadget id="calculator">9 * 2.5 * 2 * 1.4</gadget>
<output>63</output>

<result>63</result>