The electricity bill of the school in July is 360 yuan, which is 10% less than the electricity bill in June. How much is the electricity bill in June?
学校七月份的电费是360元，七月份比六月份的电费节约了10%，六月份的电费是多少元？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (1/10)</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">360 / (9/10)</gadget>
<output>400</output>

<result>400</result>