236×37×27 =236×(37×3×9) =236×(111×9) =236×999 =236×(1000−1) =236×1000−236×1 =236000−236 =235764
$465×37×27+465$
$=465×(37×3×9)+465$
$=465×(111×9)+465$
$=465×999+465$
$=465×(999+1)$
$=465×1000$
$=465000$
$37×366×9$
$=37×3×122×9$
$=111×122×9$
$=111×9×122$
$=999×122$
$=(1000-1)×122$
$=1000×122-1×122$
$=122000-122$
$=121878$
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