If you need to pay 28 yuan to buy 10 kilograms of rice, how much will you need to pay to buy 5.4 kilograms of rice?
买10千克大米需付28元，则买5.4千克大米需付多少元钱．
<gadget id="calculator">28 / 10</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(14/5) * 5.4</gadget>
<output>15.12</output>

<result>15.12</result>