/* read the numbers; notice: ech line of the input must be followed by an EOF character */
x = read();
 
/* multiplication table */
for (i=1; i<=x; ++i)
{
	for (j=1; j<=x; ++j) print i*j, "\t"
	print "\n"
}
 
/* compute the pi number accurately to 10 decimal places */
scale=x
print "\npi = ", 4*a(1), "\n"
 
/* factorial */
define f(n)
{
	if (n <= 1) return 1;
	return n * f(n-1);
}
 
print "\n";
print "1! = ", f(1), "\n";
print "5! = ", f(5), "\n";
print x, "! = ", f(x), "\n";
 

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1 999900000 1000000000