Print a Simple Python Result | Dataford Interview Questions

A small utility in Reply's machine-learning tooling must display the result of one basic calculation consistently. Implement a function that evaluates two numbers with a supplied operator and returns a formatted string suitable for printing.

Formal Specification

Implement format_calculation(a, b, operator), where a and b are numbers, and operator is one of +, -, *, or /. Return a string in the exact format a operator b = result. For division, assume b is nonzero. Use Python's normal arithmetic rules, including decimal division with /. The input will always contain a supported operator.

Do not print inside the function. Returning the string keeps the function easy to test, and a caller can print the returned value directly.

Constraints

a and b are integers or floating-point numbers
operator is one of +, -, *, /
b is nonzero when the operator is /
The result fits in Python's numeric types

Function Signature

def format_calculation(a, b, operator):

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