Smart- values rendering error

[Lean Li]

I am having a problem with a simple JSON, where I try to calculate percentage based on two values in Jira automation. 

I get this Edit issue error: 

"Error rendering smart-values when executing this rule:

Unknown unary operator * at character position 1: * 100 /"

My JSON looks like this:

{{#=}} {{issue.customfield_15834.split("/").first.asNumber}} * 100 / {{issue.customfield_15834.split("/").last.asNumber}}{{/}}

Any suggestions on how to correct this? Thank you so much alredy in advance!

[Lean Li · Accepted solution]

I managed to fix this by adjusting the syntax for multiplication

{{#=}} {{(issue.customfield_15834.split("/").first.asNumber * 100) / issue.customfield_15834.split("/").last.asNumber}}{{/}}