There is some cement in the warehouse, and half of all the cement was shipped out on the first day. At that time, there was still 54 tons of cement in the warehouse. How many tons of cement were there in the warehouse?
仓库里有一些水泥，第一天运出所有水泥的一半，这时仓库还有水泥54吨，仓库原来有水泥多少吨？
<gadget id="calculator">54 * 2</gadget>
<output>108</output>

<result>108</result>