Worked on stabilizing numeric operations within the apache/datafusion-comet repository, focusing on backend development using Rust. Addressed a critical issue in the WideDecimalBinaryExpr component by ensuring that scalar results are preserved when both inputs are scalars, which involved implementing scalar-ness tracking during evaluation. This fix prevents downstream errors in comparison and length-matching operations, thereby improving the reliability of decimal computations in analytics pipelines. Added regression tests to validate the correct propagation of scalar values, reinforcing stability and correctness for future changes. The work demonstrated attention to detail in maintaining data integrity and robustness in complex backend data processing scenarios.