Convert degree to radian

Convert degree to radian.
Note:
The radian is the standard unit of angular measure, used in many areas
of mathematics. An angle’s measurement in radians is numerically equal to the
length of a corresponding arc of a unit circle; one radian is just under 57.3
degrees (when the arc length is equal to the radius).
Test Data:
Degree : 15
Expected Result in radians: 0.2619047619047619
pi = 22/7
degree = float(input("Input degrees: "))
radian = degree * (pi/180)
print(radian)

Output:

Input degrees: 90
1.5714285714285714