Mom bought 1.5kg of brown sugar and 1.5kg of white sugar for a total of 27 yuan. Brown sugar is 10 yuan per kilogram. How much is white sugar per kilogram?
妈妈买了红糖、白糖各1.5kg，共花27元，红糖每千克10元，白糖每千克多少钱？
<gadget id="calculator">27 / 1.5</gadget>
<output>18</output>

<gadget id="calculator">18 - 10</gadget>
<output>8</output>

<result>8</result>