A factory used 480 tons of water in October, which was more than the original plan (1/9). How many tons of water was originally planned in October?
某工厂十月份用水480吨，比原计划多用了(1/9)．十月份原计划用水多少吨？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">1 + (1/9)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">480 / (10/9)</gadget>
<output>432</output>

<result>432</result>