Generated by SassMeister.com.

SassMeister-input.sass

// ----
// Sass (v3.3.0.rc.1)
// Compass (v0.13.alpha.7)
// ----

$magic-number: 24px
$size: 9px

@function round-to($number, $precision)
	@return round($number / $precision) * $precision

@function calculateEm($target, $context: $magic-number) 
	$emSize: 0
	@if $target == 0
		@return $emSize
	@if $target > $context
		@if $target < ($context * 2)
			$emSize: ($context * 2) / $target
		@else if $target < ($context * 3)
			$emSize: ($context * 3) / $target
	@else
		$emSize: $context / $target

	@return round-to($emSize + 0em, 0.0001)
	
test
	value: calculateEm($size)
	type-value: type-of(calculateEm($size))
	type-test-1: type-of(1.54839em)
	
	
	test-1: calculateEm($size) == 2.67em
	test-1: calculateEm($size) == 2.667em
	test-1: calculateEm($size) == 2.6667em
	test-2: calculateEm($size) == calculateEm($size)
	
test-1
	t-1-1: round-to(5.55555, 0.1) == 5.5
	t-1-2: round-to(5.55555, 0.1) == 5.6
	t-1-3: round-to(5.55555, 0.1) == round-to(5.55555, 0.1)

test-01
	t-01-1: round-to(5.55555, 0.01) == 5.55
	t-01-2: round-to(5.55555, 0.01) == 5.56
	t-01-3: round-to(5.55555, 0.01) == round-to(5.55555, 0.01)

test-001	
	t-001-1: round-to(5.55555, 0.001) == 5.555
	t-001-2: round-to(5.55555, 0.001) == 5.556
	t-001-3: round-to(5.55555, 0.001) == round-to(5.55555, 0.001)
	
test-0001
	t-0001-1: round-to(5.55555, 0.0001) == 5.5555
	t-0001-2: round-to(5.55555, 0.0001) == 5.5556
	t-0001-3: round-to(5.55555, 0.0001) == round-to(5.55555, 0.0001)

SassMeister-output.css

test {
  value: 2.6667em;
  type-value: number;
  type-test-1: number;
  test-1: false;
  test-1: false;
  test-1: true;
  test-2: true;
}

test-1 {
  t-1-1: false;
  t-1-2: false;
  t-1-3: true;
}

test-01 {
  t-01-1: false;
  t-01-2: false;
  t-01-3: true;
}

test-001 {
  t-001-1: false;
  t-001-2: true;
  t-001-3: true;
}

test-0001 {
  t-0001-1: false;
  t-0001-2: true;
  t-0001-3: true;
}