I understand the math; sure, 10*0=0. Looking lim a->0: x/a, though, which goes to infinity, I was implying it was easier to achieve because mathematically he'd

I understand the math; sure, 10*0=0. Looking lim a->0: x/a, though, which goes to infinity, I was implying it was easier to achieve because mathematically he'd be way past his target of 10x. But you're right that it's impossible to hit exactly 10x.