py: Allow multiple of str/list/tuple on left by an integer.
diff --git a/py/objint_mpz.c b/py/objint_mpz.c
index 7f12fbc..27f77d1 100644
--- a/py/objint_mpz.c
+++ b/py/objint_mpz.c
@@ -11,6 +11,7 @@
 #include "mpz.h"
 #include "objint.h"
 #include "runtime0.h"
+#include "runtime.h"
 
 #if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_MPZ
 
@@ -74,7 +75,13 @@
         return mp_obj_complex_binary_op(op, mpz_as_float(zlhs), 0, rhs_in);
 #endif
     } else {
-        // unsupported type
+        if (op == MP_BINARY_OP_MULTIPLY) {
+            if (MP_OBJ_IS_STR(rhs_in) || MP_OBJ_IS_TYPE(rhs_in, &mp_type_tuple) || MP_OBJ_IS_TYPE(rhs_in, &mp_type_list)) {
+                // multiply is commutative for these types, so delegate to them
+                return mp_binary_op(op, rhs_in, lhs_in);
+            }
+        }
+        // unsupported operation/type
         return MP_OBJ_NULL;
     }