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Code Review (Easy): Precise Billing Totals
Story
While updating the internal usage tracker, Mark realized that some enterprise accounts were producing totals that exceeded the platform's basic calculation limits. Eva suggested he create a helper utility that treats these large values as plain text to ensure no data is lost or rounded incorrectly during multiplication. Now, when a manager inputs a quantity like "123" and a rate of "456", the system will manually calculate the result to return "56088" as a reliable text label. This approach allows the team to support massive account scales without relying on standard math shortcuts that might fail.
Your Task
Read the story and code, then decide if the code is ready for production or needs improvement.
Hints
What would block an approval? Give me a hint.
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