A problem must detail what needs to be done in its description. There is not only one way to do what's requested. You should probably add more test cases too, at least 5, to avoid lookup table solutions.
Compute a dot product of two vectors x and y
750 Solvers
669 Solvers
573 Solvers
452 Solvers
Rounding off numbers to n decimals
1050 Solvers
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