It costs 28.4 yuan to buy 10 kilograms of rice. How much is the price for buying 5 kilograms of rice?
买10千克大米需要28.4元，买5千克的大米应付多少元钱．
<gadget id="calculator">28.4 / 10</gadget>
<output>2.84</output>

<gadget id="calculator">2.84 * 5</gadget>
<output>14.2</output>

<result>14.2</result>