This closes #1851, fix formula calculation result round issue

[realzuojianxiang]

PR Details

Description

Related Issue

Motivation and Context

How Has This Been Tested

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.21%. Comparing base (9e884c7) to head (224e998).

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1860   +/-   ##
=======================================
  Coverage   99.21%   99.21%           
=======================================
  Files          32       32           
  Lines       23972    23972           
=======================================
  Hits        23783    23783           
  Misses        101      101           
  Partials       88       88           

Flag	Coverage Δ
unittests	99.21% <100.00%> (ø)

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[xuri]

LGTM, thanks for your contribution.