3 ms·
See https://en.wikipedia.org/wiki/Modular_arithmetic https://en.wikipedia.org/wiki/Modular_arithmetic. It means that the multiplication is performed modulo 21.
by layer8 1y ago
See https://en.wikipedia.org/wiki/Modular_arithmetic https://en.wikipedia.org/wiki/Modular_arithmetic. It means that the multiplication is performed modulo 21.
- taway789aaa6 1y agoThank you!