The aunt of Chenchen Kindergarten bought 16.3 kilograms of apples today at 6.4 yuan per kilogram. How much does it cost to buy these apples?
晨晨幼儿园的阿姨今天买来了16.3千克的苹果，每千克苹果6.4元，买这些苹果需要多少元？
<gadget id="calculator">16.3 * 6.4</gadget>
<output>104.32</output>

<result>104.32</result>