diff --git a/moo/kernel/Magnitu.moo b/moo/kernel/Magnitu.moo
index a2e386c..75088cc 100644
--- a/moo/kernel/Magnitu.moo
+++ b/moo/kernel/Magnitu.moo
@@ -126,6 +126,18 @@ class(#limited) Number(Magnitude)
 		self primitiveFailed.
 	}
 
+	method mul: aNumber
+	{
+		<primitive: #_number_mul>
+		self primitiveFailed.
+	}
+
+	method mlt: aNumber
+	{
+		<primitive: #_number_mlt>
+		self primitiveFailed.
+	}
+
 	method div: aNumber
 	{
 		## integer division rounded toward zero
diff --git a/moo/kernel/test-001.moo b/moo/kernel/test-001.moo
index c55aead..832d97b 100644
--- a/moo/kernel/test-001.moo
+++ b/moo/kernel/test-001.moo
@@ -208,8 +208,6 @@ extend MyObject
 			[ (16r2dd01fc06c265c8163ac729b49d890939826ce3dd rem: 16r3b9aca00) = 394876893 ],
 			[ (16rFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF bitAnd: 16r1111111111111111111111111111111111111111) = 16r1111111111111111111111111111111111111111 ],
 
-
-
 			## 60-64
 			[ (-0.1233 * 999999.123) = -123299.8918 ],
 			[ (-0.1233 * 999999.123) asString =  '-123299.8918' ],
@@ -218,6 +216,8 @@ extend MyObject
 			[ (1.234 - 1.234) = 0 ], ## 0.000
 
 			## 65-69
+			[ (10.12 * 20.345) = 205.891 ],
+			[ (10.12 mlt: 20.345) = 205.89 ],
 			[ (-123897128378912738912738917.112323131233 div: 123.1) = -1006475453931053931053931.089458352000 ],
 			[ (-1006475453931053931053931.089458352000 * 123.1) = -123897128378912738912738917.112323131200 ],
 
diff --git a/moo/lib/exec.c b/moo/lib/exec.c
index 5db44e0..973b808 100644
--- a/moo/lib/exec.c
+++ b/moo/lib/exec.c
@@ -2870,6 +2870,22 @@ static moo_pfrc_t pf_number_mul (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
 	return MOO_PF_SUCCESS;
 }
 
+static moo_pfrc_t pf_number_mlt (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
+{
+	moo_oop_t rcv, arg, res;
+
+	MOO_ASSERT (moo, nargs == 1);
+
+	rcv = MOO_STACK_GETRCV(moo, nargs);
+	arg = MOO_STACK_GETARG(moo, nargs, 0);
+
+	res = moo_mltnums(moo, rcv, arg);
+	if (!res) return (moo->errnum == MOO_EINVAL? MOO_PF_FAILURE: MOO_PF_HARD_FAILURE);
+
+	MOO_STACK_SETRET (moo, nargs, res);
+	return MOO_PF_SUCCESS;
+}
+
 static moo_pfrc_t pf_number_div (moo_t* moo, moo_mod_t* mod, moo_ooi_t nargs)
 {
 	moo_oop_t rcv, arg, res;
@@ -3873,6 +3889,7 @@ static pf_t pftab[] =
 	{ "_number_le",                            { pf_number_le,                            1, 1 } },
 	{ "_number_lt",                            { pf_number_lt,                            1, 1 } },
 	{ "_number_mdiv",                          { pf_number_mdiv,                          1, 1 } },
+	{ "_number_mlt",                           { pf_number_mlt,                           1, 1 } },
 	{ "_number_mul",                           { pf_number_mul,                           1, 1 } },
 	{ "_number_ne",                            { pf_number_ne,                            1, 1 } },
 	{ "_number_negated",                       { pf_number_negated,                       0, 0 } },