Use 3 kilograms of toffee at 9 yuan per kilogram, 3 kilograms of crisp candy at 8 yuan per kilogram, and 4 kilograms of fruit candy at 6 yuan per kilogram, and mix them into assorted candies. What is the average price per kilogram of this assorted candy?
用每千克9元的奶糖3千克，每千克8元的酥糖3千克，每千克6元的水果糖4千克，混合成什锦糖，这种什锦糖平均每千克的价格是多少元．
<gadget id="calculator">9 * 3</gadget>
<output>27</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">6 * 4</gadget>
<output>24</output>

<gadget id="calculator">27 + 24 + 24</gadget>
<output>75</output>

<gadget id="calculator">3 + 3 + 4</gadget>
<output>10</output>

<gadget id="calculator">75 / 10</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>