Strengthen the daily chemical factory, produce 420,000 boxes of soap in August, which is 3/7 less than in October, how many boxes of soap are produced in October?
强化日用化工厂，八月份生产肥皂420000箱，比十月份少(3/7)，十月份生产肥皂多少箱？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">1 - (3/7)</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">420_000 / (4/7)</gadget>
<output>735_000</output>

<result>735_000</result>