Xiao Cong has 2.1 times as many stamps as Xiao Ming. If Xiao Cong gives Xiao Ming 11 stamps, they both have the same number of stamps. How many stamps did Xiao Cong and Xiao Ming share?
小聪邮票的张数是小明的2.1倍，如果小聪送给小明11张，两人的邮票就一样多了，小聪和小明原来共有邮票多少张？
<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">2.1 - 1</gadget>
<output>1.1</output>

<gadget id="calculator">22 / 1.1</gadget>
<output>20</output>

<gadget id="calculator">20 * 2.1</gadget>
<output>42</output>

<gadget id="calculator">20 + 42</gadget>
<output>62</output>

<result>62</result>