You weigh 240 pounds how many stones is that?

1 stone = 14 lbs

So, to work out how many stones, divide 197 / 14 = 14.0714286

The bit before the decimal point is the number of stones, the bit after can be used to find how many pounds.

Take the number after the decimal and multiply 14 * 0.0714286 = 1

So 197 lbs is 14 stone, 1 pound.