after the entry "(1e5) shr 4" result is the same as "(1e5) shr 6"

(1e5) shr 4 = 100000 shr 4 = 6250
(1e5) shr 6 = 100000 shr 6 = 1562

You can do (1e5) / 10 = 10 000
then 10 000 * 10 = 100 000
then 100 000 >> 6 = 1562

After some quick checking, I see that it actually never performs Arithmetic/logic operation over number with scientific notation (which the calculator surely interprets them as float values and fasm is only capable of storing them)