1008 * 604 − 105984 : 12 − 54321 = 545679
1) $\snippet{name: column_multiplication, x: 1008, y: 604}$
2) $\snippet{name: long_division, x: 105984, y: 12}$
3) $\snippet{name: op_column, sign: '-', x: 608832, y: 8832, z: 600000}$
4) $\snippet{name: op_column, sign: '-', x: 600000, y: 54321, z: 545679}$

(57 * 34 + 812754 : 27) : 18 = 1780
1) $\snippet{name: column_multiplication, x: 57, y: 34}$
2) $\snippet{name: long_division, x: 812754, y: 27}$
3) $\snippet{name: op_column, sign: '+', x: 1938, y: 30102, z: 32040}$
4) $\snippet{name: long_division, x: 32040, y: 18}$