We note first that y=5 since that is the only non-zero digit that, when it is multiplied by 3, has itself as the units digit. So there is a carry of 1 into the tens column. We note also that a=1 or a=2 as "fly" < 1000 and therefore 3× "fly" < 3000. We now need 3×l+1 to end in either 1 or 2 and the only possibility is l=7, giving a=2 with a carry of 2 into the hundreds column. As a=2, f must be at least 6. However, if f=6 then w=0 which is not allowed. Also, the letters represent different digits, so f ¹ 7 and we can also deduce that f ¹ 9 since f=9 would make w=9. Hence f=8, making w=6 and the letters represent 875×3=2625.