inch = float(input());
sm = inch * 2.54;
print(sm);
ce329f3697877e8fd36c5cd6a986be8dcb71d01d
<mask token>

<mask token>
print(sm)

inch = float(input())
sm = inch * 2.54
print(sm)

inch = float(input());
sm = inch * 2.54;
print(sm);