# Pastebin 9CiRMpPY
public final void mul(GMatrix var1) {
        if(this.nCol == var1.nRow && this.nCol == var1.nCol) {
            double[][] var5 = new double[this.nRow][this.nCol];

            for(int var2 = 0; var2 < this.nRow; ++var2) {
                for(int var3 = 0; var3 < this.nCol; ++var3) {
                    var5[var2][var3] = 0.0D;

                    for(int var4 = 0; var4 < this.nCol; ++var4) {
                        var5[var2][var3] += this.values[var2][var4] * var1.values[var4][var3];
                    }
                }
            }

            this.values = var5;
        } else {
            throw new MismatchedSizeException(VecMathI18N.getString("GMatrix0"));
        }
    }