29.8 * 22.15 == 660.07 // false

[Kukurykus]

29.8 * 22.15 == 660.07 // false

Extendscript:

29.8 * 22.15 // 660.07
29.8 * 22.15 == 660.07 // false

Chrome Browser Console (F12):

29.8 * 22.15 // 660.0699999999999

Extendscript:

29.8 * 22.15 == 660.0699999999999 // true

minimal equality:

29.8 * 22.15 == 660.06999999999988 // true

maximal equality:

29.8 * 22.15 == 660.069999999999993 // true

so the range is: 993 - 88 = 905

Workarounds:

(29.8 * 22.15).toString() == 660.07; // true
(29.8 * 22.15).toFixed(2) == 660.07; // true
(29.8 * 22.15).toPrecision(5) == 660.07; // true

[r-bin]

var x = 29.8 * 22.15;
var y = 660.07;

alert(Number(x).toSource() == Number(y).toSource())

[Kukurykus]

You mean that's another a workaround?

[Tom Ruark]

Comparing Floating-Point Numbers Is Tricky