code: def _kernel_multiply(a, b, out):
      for i, (x, y) in enumerate(zip(a, b)):
          out[i] = x * y
  
imports: import pytest
  import cudf
  from cudf.core.column import column
  from cudf.testing._utils import assert_eq, gen_rand_series
label_desc: Use image node_id 1 for calling a global function with example usage: _kernel_multiply(a, b, out) without return types