There was some cement in a certain warehouse. After 45.5 tons were shipped out on the first day, another 16.5 tons were shipped in. Now there are 41.8 tons of cement in the warehouse. Q: How many tons of cement was there in the warehouse?
某仓库原有一些水泥，第一天运出45.5吨后，又运进16.5吨，现在仓库有水泥41.8吨．问：仓库原来有水泥多少吨？
<gadget id="calculator">41.8 - 16.5</gadget>
<output>25.3</output>

<gadget id="calculator">25.3 + 45.5</gadget>
<output>70.8</output>

<result>70.8</result>