[#mp_units-quantity-01-operator_star_eq-07]
= xref:mp_units.adoc[mp_units]::xref:mp_units/quantity-01.adoc[quantity]::operator*=
:relfileprefix: ../../
:mrdocs:

Multiplication assignment operator

== Synopsis

Declared in `<mp‐units/framework/quantity.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
template</* implementation-defined */ Value>
requires requires(rep& a, const Value b) {
      { a *= b } ‐> std::same_as<rep&>;
    }
constexpr
xref:mp_units/quantity-01.adoc[quantity]&
operator*=(Value const& val) &;
----

== Return Value

Reference to the current object

== Parameters

[cols=2]
|===
| Name
| Description
| *val*
| The right operand
|===


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