1 is correct
calculators should count it like this: = 1
the calculators in the first picture is wrong
nah
x equals to (x)/(y), not x/y, therefore this cant be converted.
y
and calculators don't do them like that, they do it strongly sequential, meaning it will never put () if its not specified/needed.
don't forget that if priorities are equal(which is the case with division and mul), there's mathematical law to take leftmost expression first.