A factory produced 152.7 tons of copper in January, produced 94.5 tons more in February than in January, and produced 105.1 tons less in March than in February. How many tons of copper did it produce in March?
一个工厂一月份产铜152.7吨，二月份比一月份多生产94.5吨，三月份比二月份少产105.1吨，三月份产铜多少吨？
<gadget id="calculator">94.5 - 105.1</gadget>
<output>-10.6</output>

<gadget id="calculator">152.7 + (-10.6)</gadget>
<output>142.1</output>

<result>142.1</result>