308 * 37 − 29 * 101 + 253 * 9 = 11396 − 2929 + 2277 = 8467 + 2277 = 10744
1)
$\snippet{name: column_multiplication, x: 308, y: 37}$
2)
$\snippet{name: column_multiplication, x: 101, y: 29}$
3)
$\snippet{name: column_multiplication, x: 253, y: 9}$
4)
$\snippet{name: op_column, sign: '-', x: 11396, y: 2929, z: 8467}$
5)
$\snippet{name: op_column, sign: '+', x: 8467, y: 2277, z: 10744}$

(3107 + 287) * 43 = 3391 * 43 = 145813
1)
$\snippet{name: op_column, sign: '+', x: 3107, y: 287, z: 3391}$
2)
$\snippet{name: column_multiplication, x: 3391, y: 43}$

38027 * 24 + 24508 − 2408 * 356 = 912648 + 24508 − 857248 = 937156 − 857248 = 79908
1)
$\snippet{name: column_multiplication, x: 38027, y: 24}$
2)
$\snippet{name: column_multiplication, x: 2408, y: 356}$
3)
$\snippet{name: op_column, sign: '+', x: 912648, y: 24508, z: 937156}$
4)
$\snippet{name: op_column, sign: '-', x: 937156, y: 857248, z: 79908}$

(10000 − 7875) * (10 * 201 − 1785) = 2125 * (2010 − 1785) = 2125 * 225 = 478125
1)
$\snippet{name: op_column, sign: '-', x: 10000, y: 7875, z: 2125}$
2)
$\snippet{name: column_multiplication, x: 201, y: 10}$
3)
$\snippet{name: op_column, sign: '-', x: 2010, y: 1785, z: 225}$
4)
$\snippet{name: column_multiplication, x: 2125, y: 225}$