There is a batch of rice in the cafeteria. The first week used up (1/4) of the total amount, and the rest (3/7) was used up in the second week. At this time, there is still 480kg left. How many kg is this batch of rice?
食堂有一批大米，第一周用去了总数的(1/4)，第二周用去了剩余的(3/7)，这时还剩下480kg，这批大米有多少kg？
<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">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">480 / (4/7) / (3/4)</gadget>
<output>1_120</output>

<result>1_120</result>