Mom went to the supermarket to buy candy, toffee 10.5 yuan per kilogram, bought 3.2kg; chocolate candy also bought 3.2kg. Mom paid a total of 64 yuan. How much is chocolate candy per kilogram?
妈妈去超市买糖果，奶糖每千克10.5元，买了3.2千克；巧克力糖也买了3.2千克．妈妈一共付了64元．巧克力糖每千克多少钱？
<gadget id="calculator">10.5 * 3.2</gadget>
<output>33.6</output>

<gadget id="calculator">64 - 33.6</gadget>
<output>30.4</output>

<gadget id="calculator">30.4 / 3.2</gadget>
<output>9.5</output>

<result>9.5</result>