[#FeeFrac-Mul]
= xref:FeeFrac.adoc[FeeFrac]::Mul
:relfileprefix: ../
:mrdocs:

Helper function for 32*64 signed multiplication, returning an unspecified but totally ordered type. This is a version relying on __int128.

== Synopsis

Declared in `<util/feefrac.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
static
__int128
Mul(
    int64_t a,
    int32_t b) noexcept;
----

== Return Value

The 128‐bit product.

== Parameters

[cols="1,4"]
|===
| Name| Description
| *a*
| The 64‐bit signed factor.
| *b*
| The 32‐bit signed factor.
|===


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