There are 10 more males than females, and 10% fewer females than males. How many females are there?
男比女多10人，女比男少10%，女生是多少人？
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10 / (1/10)</gadget>
<output>100</output>

<gadget id="calculator">100 - 10</gadget>
<output>90</output>

<result>90</result>