The average age of Xiaoding, Xiaodong, and Xiaofang is 12 years old, and the average age of Xiaodong, Xiaofang, and Xiaoying is 10 years old. How much older is Xiaoding than Xiaoying?
小丁、小冬和小方的平均年龄是12岁，小冬、小方和小英的平均年龄是10岁，小丁比小英大多少岁？
<gadget id="calculator">12 * 3</gadget>
<output>36</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">36 - 30</gadget>
<output>6</output>

<result>6</result>