Dongdong and Mingming are both philatelists. The ratio of the number of stamps between Dongdong and Mingming is 8:5. If Dongdong gives Mingming 6 stamps, then they have the same number of stamps, and how many stamps they have in common.
东东和明明都是集邮爱好者．东东和明明现在的邮票张数比是8：5．如果东东给明明6张邮票，那么他们的邮票张数就相等，两人共有邮票多少张．
<gadget id="calculator">8 / 13</gadget>
<output>8/13 = around 0.615385</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(8/13) - (1/2)</gadget>
<output>3/26 = around 0.115385</output>

<gadget id="calculator">6 / (3/26)</gadget>
<output>52</output>

<result>52</result>