A family of three went to eat lamb skewers. The mother ate 2 skewers more than the child, the father ate twice as much as the mother, and the child ate 10 skewers less than the father. How many skewers did the whole family eat?
一家三口去吃羊肉串．妈妈比孩子多吃了2串，爸爸吃的是妈妈吃的2倍，孩子比爸爸少吃了10串．全家共吃了多少串．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">10 - 4</gadget>
<output>6</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

<gadget id="calculator">6 / 1</gadget>
<output>6</output>

<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">6 + 10</gadget>
<output>16</output>

<gadget id="calculator">6 + 8 + 16</gadget>
<output>30</output>

<result>30</result>