Xiaodong and Xiaoying each had some change, and after Xiaodong gave Xiaoying 13 yuan, they both had the same amount of money. It turns out that Xiaoying is much less than Xiaodong.
小东和小英各有一些零钱，小东给小英13元后，两人的钱数同样多．原来小英比小东少多少元．
<gadget id="calculator">13 + 13</gadget>
<output>26</output>

<result>26</result>