Xiaoqiang has 56 stamps, and Xiaofang has twice as many stamps as Xiaoqiang. How many stamps do they have in total?
小强有56张邮票，小芳的邮票数是小强的2倍，他们一共有多少张邮票？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">56 * 3</gadget>
<output>168</output>

<result>168</result>