22.4 tons of flour are removed from the warehouse, and 18.7 tons are left. How many tons of flour are there in the warehouse?
从仓库里运走22.4吨面粉，还剩18.7吨，仓库里原有面粉多少吨？
<gadget id="calculator">22.4 + 18.7</gadget>
<output>41.1</output>

<result>41.1</result>