The fertilizer factory produced 483.6 tons of fertilizers in June, 254.8 tons in the first half of July, and 287.4 tons in the second half of July. How many tons more fertilizers were produced in July than in June?
化肥厂六月份生产化肥483.6吨，七月份上半月生产254.8吨，下半月生产287.4吨，七月份比六月份多生产化肥多少吨？
<gadget id="calculator">287.4 - 483.6</gadget>
<output>-196.2</output>

<gadget id="calculator">254.8 + (-196.2)</gadget>
<output>58.6</output>

<result>58.6</result>