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

### 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`