The electricity bill of the experimental kindergarten in April is 180 yuan, which is 10% less than that in March. How much is the electricity bill in March?
实验幼儿园四月份电费是180元，比三月份节省了10%，三月份电费是多少元？
<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">180 / (9/10)</gadget>
<output>200</output>

<result>200</result>