| 摘要 |
In the JASS card game, which is very popular in Switzerland, the various game values have to be doubled, trebled, quadrubled etc. To simplify this calculation, the multiplication tables are printed on the longitudinal edges of the slate which is frames in wooden or acrylic glass plates with grooves for the slate. Alternatively, the multiplication tables can be printed on all four sides of a JASS carpet, made of synthetic leather and foam rubber. ADVANTAGE - This prevents errors in the calculation.
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