Create a command-line tool fixcalc that performs fixed-point arithmetic operations on decimal numbers.

Create a command-line tool fixcalc that performs fixed-point arithmetic operations on decimal numbers.: a task in termgrade-bandcentral-gemma4-31b-bash: TermGrade Band-Central: the 151-task selection and its splits (Harbor dataset). Goal: Read a single arithmetic expression from stdin, compute the…

The task

**Goal:** Read a single arithmetic expression from stdin, compute the result using fixed-point decimal arithmetic, and print the result to stdout.

Part of ai-and/termgrade-bandcentral-gemma4-31b-bash.