(904 − 66 * 5) : 7 = (904 − 330) : 7 = 574 : 7 = 82
$\snippet{name: column_multiplication, x: 66, y: 5}$
 
$\snippet{name: op_column, sign: '-', x: 904, y: 330, z: 574}$
 
$\snippet{name: long_division, x: 574, y: 7}$
 
(400 − 32 : 4) * 3 = (400 − 8) * 3 = 392 * 3 = 936
$\snippet{name: column_multiplication, x: 392, y: 3}$
 
(203 * 4 + 188) : 100 = (812 + 188) : 100 = 1000 : 100 = 10
$\snippet{name: column_multiplication, x: 203, y: 4}$
 
$\snippet{name: op_column, sign: '+', x: 812, y: 188, z: 1000}$
 
(107 * 7 + 151) : 10 = (749 + 151) : 10 = 900 : 10 = 90
$\snippet{name: column_multiplication, x: 107, y: 7}$
 
$\snippet{name: op_column, sign: '+', x: 749, y: 151, z: 900}$