The fruit shop mixes 2 kg of halva, 3 kg of fruit candy, and 5 kg of toffee into assorted candies. It is known that halva is 4.40 yuan per kilogram, fruit candy is 4.20 yuan per kilogram, and toffee is 7.20 yuan per kilogram. How much is a kilogram.
果品店把2千克酥糖，3千克水果糖，5千克奶糖混合成什锦糖，已知酥糖每千克4.40元，水果糖每千克4.20元，奶糖每千克7.20元，问：什锦糖每千克多少元．
<gadget id="calculator">4.4 * 2</gadget>
<output>8.8</output>

<gadget id="calculator">4.2 * 3</gadget>
<output>12.6</output>

<gadget id="calculator">7.2 * 5</gadget>
<output>36</output>

<gadget id="calculator">8.8 + 12.6 + 36</gadget>
<output>57.4</output>

<gadget id="calculator">2 + 3 + 5</gadget>
<output>10</output>

<gadget id="calculator">57.4 / 10</gadget>
<output>5.74</output>

<result>5.74</result>