The cement factory produced 493.6 tons of cement in June, 654.8 tons in the first half of July, and 367.4 tons in the second half of July. How many kilograms less cement was produced in June than in July?
水泥厂六月份生产水泥493.6吨，七月份上半月生产654.8吨，下半月生产367.4吨，六月份比七月份少生产水泥多少千克？
<gadget id="calculator">1_022.2 - 493.6</gadget>
<output>528.6</output>

<gadget id="calculator">528.6 * 1_000</gadget>
<output>528_600</output>

<result>528_600</result>