The fertilizer factory produced 55.7 tons of fertilizer in the first half of the month, and 62.5 tons in the second half of the month, resulting in an increase of 45.1 tons over the plan. How many tons does the fertilizer plant plan to produce this month?
化肥厂上半月生产化肥55.7吨，下半月生产62.5吨，结果比计划多生产45.1吨．化肥厂本月计划生产多少吨？
<gadget id="calculator">62.5 - 45.1</gadget>
<output>17.4</output>

<gadget id="calculator">55.7 + 17.4</gadget>
<output>73.1</output>

<result>73.1</result>