The iron and steel plant originally planned to produce 246,500 tons of steel for the whole year, but it turned out to be 155,800 tons in the first half of the year and 154,200 tons in the second half of the year.
钢铁厂原计划全年生产钢铁24.65万吨，结果上半年15.58万吨，下半年生产15.42万吨，全年超过计划多少万吨？
<gadget id="calculator">15.58 + 15.42</gadget>
<output>31</output>

<gadget id="calculator">31 - 24.65</gadget>
<output>6.35</output>

<result>6.35</result>