bash. How to remove the syntax error?

Question

linux

Did the calculation of real numbers.
The terminal keeps throwing a syntax error.

Everything works fine, I do not understand what he is complaining about.
How to remove this error from the terminal?

Answer 1

Bash does not accept real numbers, only integers. Output the operation to some calculator and read data from it.

Answer 2

$ echo 5.32/4.3 | bc -l
1.23720930232558139534

Answer 3

put the options in quotes
and treat them as arguments in the script
./cancul2.sh "$1" "$2" "$3"