The price of a kind of toffee is 4.3 yuan per kilogram, how much is it needed to buy 0.5 kilogram.
一种奶糖的价格是每千克4.3元，买0.5千克需要多少元．
<gadget id="calculator">4.3 * 0.5</gadget>
<output>2.15</output>

<result>2.15</result>