Smarty How to do string dynamic stitching in the template engine?

How do string dynamic stitching be done in the Smarty template engine?
<{foreach from= $sellerData Key=key item=value}>
<{$value .seller_id}>

<{/foreach}>
I want to $value.seller_id this value is how much so star_02 in the 02 is how much, is 02 is dynamic, in the template how to splice it? Thank you
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not directly?
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<{foreach from= $sellerData Key=key item=value}>
<{$value .seller_id}>

<{/foreach}>

It's so easy to read.
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{$value. seller_id} on span class= "star_02" > not? Span class= "star_{$value. seller_id}";???

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