Mix 15 kilograms of toffee at 7.8 yuan per kilogram, 10 kilograms of fruit candy at 5.1 yuan per kilogram, and 5 kilograms of crisp candy at 6 yuan per kilogram to make assorted candies. What is the price per kilogram of this assorted candies?
用每千克7.8元的奶糖15千克，每千克5.1元的水果糖10千克，每千克6元的酥糖5千克混合成什锦糖，这种什锦糖每千克的价钱是多少元？
<gadget id="calculator">7.8 * 15</gadget>
<output>117</output>

<gadget id="calculator">5.1 * 10</gadget>
<output>51</output>

<gadget id="calculator">6 * 5</gadget>
<output>30</output>

<gadget id="calculator">117 + 51 + 30</gadget>
<output>198</output>

<gadget id="calculator">15 + 10 + 5</gadget>
<output>30</output>

<gadget id="calculator">198 / 30</gadget>
<output>33/5 = around 6.6</output>

<result>33/5 = around 6.6</result>