fix(comp:input-number): decimal precision calculation error

[imguolao]

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What kind of change does this PR introduce?

• Bugfix
• Feature
• Component style update
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
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[idux-bot]

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[codecov]

Codecov Report

Merging #688 (348c419) into main (b798986) will increase coverage by 0.29%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main     #688      +/-   ##
==========================================
+ Coverage   83.64%   83.94%   +0.29%     
==========================================
  Files         393      394       +1     
  Lines        9849     9901      +52     
  Branches     2268     2282      +14     
==========================================
+ Hits         8238     8311      +73     
+ Misses       1611     1590      -21     

Impacted Files	Coverage Δ
...ages/components/input-number/src/useInputNumber.ts	76.41% <ø> (-10.97%)	⬇️
packages/components/utils/src/useFormElement.ts	95.65% <0.00%> (-4.35%)	⬇️
packages/cdk/a11y/src/focusMonitor.ts	85.35% <0.00%> (-0.65%)	⬇️
packages/components/rate/src/Rate.tsx	73.75% <0.00%> (-0.33%)	⬇️
packages/components/switch/src/Switch.tsx	90.62% <0.00%> (-0.29%)	⬇️
packages/components/radio/src/Radio.tsx	86.44% <0.00%> (-0.23%)	⬇️
packages/components/slider/src/useSlider.ts	57.75% <0.00%> (-0.23%)	⬇️
packages/components/checkbox/src/Checkbox.tsx	95.58% <0.00%> (-0.07%)	⬇️
packages/cdk/forms/src/utils.ts	92.30% <0.00%> (ø)
... and 40 more

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