Round issue

[MoOx]

:root {
  --fontSize: 3rem;
}

body { font-size: calc(var(--fontSize) * 1.2); }

gives

body { font-size: 3.5999999999999996rem; }

[bloodyowl]

floating points are tricky, a quirk workaroud would be to multiply both numbers then divide the computed number by Math.pow(10, numberOfDigitsAfterDot)

[MoOx]

Closed by MoOx/reduce-css-calc@62c4a50