240 : 8 − 30 : 2 + 561 : 17 + 66 : 11 = 30 − 15 + 33 + 6 = 54

47027 * 24 + 31352 − 2408 * 356 = 1128648 + 31352 − 857248 = 1160000 − 857248 = 302752
1)
$\snippet{name: column_multiplication, x: 47027, y: 24}$
2)
$\snippet{name: column_multiplication, x: 2408, y: 356}$
3)
$\snippet{name: op_column, sign: '+', x: 1128648, y: 31352, z: 1160000}$
3)
$\snippet{name: op_column, sign: '-', x: 1160000, y: 857248, z: 302752}$

(240 : 8 − 30) : 2 + (561 : 17 + 66) : 11 = (30 − 30) : 2 + (33 + 66) : 11 = 0 : 2 + 99 : 11 = 9

140013 − 25 * 3571 − 119 * 309 = 140013 − 89275 − 36771 = 50738 − 36771 = 13967
1)
$\snippet{name: column_multiplication, x: 3571, y: 25}$
2)
$\snippet{name: column_multiplication, x: 119, y: 309}$
3)
$\snippet{name: op_column, sign: '-', x: 140013, y: 89275, z: 50738}$
4)
$\snippet{name: op_column, sign: '-', x: 50738, y: 36771, z: 13967}$