a: to :rational [1 2]
b: to :rational [3 4]

print ["a:" a]
print ["b:" b]

print ["a + b  :" a + b]
print ["a - b  :" a - b]
print ["a * b  :" a * b]
print ["a / b  :" a / b]
print ["a // b :" a // b]
print ["a % b  :" a % b]

print ["reciprocal b:" reciprocal b]
print ["neg a:" neg a]

print ["pi ~=" to :rational 3.14]