long t0 = System.currentTimeMillis();
float f = 0;
for (int i=0; i<HOW_MANY; i++)
f *= i;
long t1 = System.currentTimeMillis();
double d = 0;
for (int i=0; i<HOW_MANY; i++)
d *= i;
long t2 = System.currentTimeMillis();
System.out.println("Float: " + (t1 - t0) + " " + f);
System.out.println("Double: " + (t2 - t1) + " " + d);
