657 * 4 = 2628
$\snippet{name: column_multiplication, x: 657, y: 4}$
 
509 * 7 = 3563
$\snippet{name: column_multiplication, x: 509, y: 7}$
 
2193 * 5 = 10965
$\snippet{name: column_multiplication, x: 2193, y: 5}$
 
7640 * 8 = 61120
$\snippet{name: column_multiplication, x: 7640, y: 8}$
 
40018 * 9 = 360162
$\snippet{name: column_multiplication, x: 40018, y: 9}$
 
80700 * 6 = 484200
$\snippet{name: column_multiplication, x: 80700, y: 6}$
 
(9010 − 6235) * 9 = 2775 * 9 = 24975
$\snippet{name: op_column, sign: '-', x: 9010, y: 6235, z: 2775}$
 
$\snippet{name: column_multiplication, x: 2775, y: 9}$
 
8 * (4348 + 2062) = 8 * 6410 = 51280
$\snippet{name: op_column, sign: '+', x: 4348, y: 2062, z: 6410}$
 
$\snippet{name: column_multiplication, x: 6410, y: 8}$