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what's the difference between i32 and u32 data type representation
Long I-32 is a 32-bit Integer. Unsigned Long U32 is a 32-bit Unsigned Integer.
what are the most commonly used numeric data types
Common representations are Double Precision Floating Point (Double) and 32-bit Integer (I32).
how are numeric data types calculated
Calculations are usually performed using the same data type representations for input and getting an appropriate data type representation for output
what happens with calculation if data types are different
If different data type representations are used for inputs, some of the data types maybe “coerced” or converted to the same data type representation as the other inputs.

Question: anything else
Self-contained rewrite: anything else about different data calculation besides coercing