All the keys are inserted as a picture, click image to select it, before choosing to do a simple calculation, the numbers 1 to 13 (based on 54 cards), then for basic mathematical operations, such as+,- ,*,/,(,) other, making the result is 24.

24\CalculateExpression.class
..\CalculateExpression.java
..\Card.class
..\Card.java
..\FindExpression.class
..\FindExpression.java
..\GameMode.class
..\GameMode.java
..\image\(.png
..\.....\(S.png
..\.....\).png
..\.....\)S.png
..\.....\+.png
..\.....\+S.png
..\.....\-.png
..\.....\-S.png
..\.....\=.png
..\.....\=S.png
..\.....\Card\Back.png
..\.....\....\Club\1.png
..\.....\....\....\10.png
..\.....\....\....\11.png
..\.....\....\....\12.png
..\.....\....\....\13.png
..\.....\....\....\2.png
..\.....\....\....\3.png
..\.....\....\....\4.png
..\.....\....\....\5.png
..\.....\....\....\6.png
..\.....\....\....\7.png
..\.....\....\....\8.png
..\.....\....\....\9.png
..\.....\....\Diamond\1.png
..\.....\....\.......\10.png
..\.....\....\.......\11.png
..\.....\....\.......\12.png
..\.....\....\.......\13.png
..\.....\....\.......\2.png
..\.....\....\.......\3.png
..\.....\....\.......\4.png
..\.....\....\.......\5.png
..\.....\....\.......\6.png
..\.....\....\.......\7.png
..\.....\....\.......\8.png
..\.....\....\.......\9.png
..\.....\....\Heart\1.png
..\.....\....\.....\10.png
..\.....\....\.....\11.png
..\.....\....\.....\12.png
..\.....\....\.....\13.png
..\.....\....\.....\2.png
..\.....\....\.....\3.png
..\.....\....\.....\4.png
..\.....\....\.....\5.png
..\.....\....\.....\6.png
..\.....\....\.....\7.png
..\.....\....\.....\8.png
..\.....\....\.....\9.png
..\.....\....\Spade\1.png
..\.....\....\.....\10.png
..\.....\....\.....\11.png
..\.....\....\.....\12.png
..\.....\....\.....\13.png
..\.....\....\.....\2.png
..\.....\....\.....\3.png
..\.....\....\.....\4.png
..\.....\....\.....\5.png
..\.....\....\.....\6.png
..\.....\....\.....\7.png
..\.....\....\.....\8.png
..\.....\....\.....\9.png
..\.....\....S\back.png
..\.....\.....\Club\1.png
..\.....\.....\....\10.png
..\.....\.....\....\11.png
..\.....\.....\....\12.png
..\.....\.....\....\13.png
..\.....\.....\....\2.png
..\.....\.....\....\3.png
..\.....\.....\....\4.png
..\.....\.....\....\5.png
..\.....\.....\....\6.png
..\.....\.....\....\7.png
..\.....\.....\....\8.png
..\.....\.....\....\9.png
..\.....\.....\Diamond\1.png
..\.....\.....\.......\10.png
..\.....\.....\.......\11.png
..\.....\.....\.......\12.png
..\.....\.....\.......\13.png
..\.....\.....\.......\2.png
..\.....\.....\.......\3.png
..\.....\.....\.......\4.png
..\.....\.....\.......\5.png
..\.....\.....\.......\6.png
..\.....\.....\.......\7.png
..\.....\.....\.......\8.png
..\.....\.....\.......\9.png
..\.....\.....\Heart\1.png
..\.....\.....\.....\10.png

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