800 − 296 = 168 * 3 − верно.
$\snippet{name: op_column, sign: '-', x: 800, y: 296, z: 504}$
 
$\snippet{name: column_multiplication, x: 168, y: 3}$
 
888 : 3 = 703 − 407 − верно.
$\snippet{name: long_division, x: 888, y: 3}$
 
$\snippet{name: op_column, sign: '-', x: 703, y: 407, z: 296}$