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2.31.4  Multiplication in ℤ/pℤ or in ℤ/pℤ[x] : *

* multiplies two integers in ℤ/pℤ or two polynomials in ℤ/pℤ[x]. For polynomial expressions, use the normal command to simplify.
For integers in ℤ/pℤ, input :

31%13*10%13

Output :

-2%13

For polynomials with coefficients in ℤ/pℤ, input :

normal((11*x+5)%13*(8*x+6 )% 13)

or also :

normal((11% 13*x+5%13)*(8% 13*x+6%13))

Output :

(-3%13)*x^2+(2%13)*x+4%13

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