456 * 803 = 366168
$\snippet{name: column_multiplication, x: 456, y: 803}$
 
605 * 102 = 617110
$\snippet{name: column_multiplication, x: 605, y: 102}$
 
105 * 420 = 44100

 
521 * 180 = 93780

 
(180876 + 251367) : 9 = 432243 : 9 = 48027
1) $\snippet{name: op_column, sign: '+', x: '180876', y: '251367', z: '432243'}$;
2) $\snippet{name: long_division, x: 432243, y: 9}$.
 
(580000 − 35410) : 90 = 544590 : 90 = 6501
1) $\snippet{name: op_column, sign: '-', x: '580000', y: '35410', z: '544590'}$;
2) $\snippet{name: long_division, x: 544590, y: 90}$.