code: def test_correct_backward_binary():
      _check_backward_binary(lambda xs: (xs[0] * xs[1],))
  
file_path: chainer/tests/chainerx_tests/unit_tests/test_check_backward.py
imports: import pytest
  import chainerx
label_desc: Use image node_id 5 for calling a global function with example usage: test_correct_backward_binary() without return types