Great, thanks a lot. that helped. One more thing for this: 
my $data = <STDIN>;
my (@data) = split (" ", $data);

my $n = shift (@data);
my $m = shift (@data);
my $a = shift (@data);

my $ma = $m/$a;
my $na = $n/$a;

if (int($ma) != $ma) {
    $ma = int($ma) +1;          
}

if (int($na) != $na) {
    $na = int($na) +1; 
}

$x = int($ma*$na);
print $x;

[download]

#This script solves the problem of counting the amount of a*a sized block to cover the surface area of the city square, sized n*m.

When i check n = 1000000000, m = 1000000000, a = 1 i get a result x = 1e+18 instead of 1000000000000000000, despite the fact that i use int operator. could anyone help with printing the exact number?

thanks in advance, the rest cases pass ok.

In reply to Re^4: Input data problem by Anonymous Monk
in thread Input data problem by Anonymous Monk

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