steel plant originally planned to produce 395,000 tons for the whole year, but actually produced 198,500 tons in the first half of the year and 213,600 tons in the second half of the year.
某钢铁厂原计划全年生产39.5万吨，实际上半年生产了19.85万吨，下半年生产21.36万吨，全年实际超产多少万吨？
<gadget id="calculator">21.36 - 39.5</gadget>
<output>-18.14</output>

<gadget id="calculator">19.85 + (-18.14)</gadget>
<output>1.71</output>

<result>1.71</result>