fix variable defined multiple times

Author: Hasenn

maths/chudnovsky_algorithm.py

@@ -44,15 +44,16 @@ def pi(precision: int) -> str:
     getcontext().prec = precision
     num_iterations = ceil(precision / 14)
     constant_term = 426880 * Decimal(10005).sqrt()
-    multinomial_term = 1
     exponential_term = 1
     linear_term = 13591409
     partial_sum = Decimal(linear_term)
     for k in range(1, num_iterations):
-        multinomial_term = factorial(6 * k) // (factorial(3 * k) * factorial(k) ** 3)
+        multinomial_term = factorial(
+            6 * k) // (factorial(3 * k) * factorial(k) ** 3)
         linear_term += 545140134
         exponential_term *= -262537412640768000
-        partial_sum += Decimal(multinomial_term * linear_term) / exponential_term
+        partial_sum += Decimal(multinomial_term *
+                               linear_term) / exponential_term
     return str(constant_term / partial_sum)[:-1]