25 * (63 − 741 : 19) = 25 * (63 − 39) = 25 * 24 = 600
1) $\snippet{name: long_division, x: 741, y: 19}$
2) $\snippet{name: op_column, sign: '-', x: 63, y: 39, z: 24}$
3) $\snippet{name: column_multiplication, x: 25, y: 24}$

(900 − 7218 : 9) * 12 = (900 − 802) * 12 = 98 * 12 = 1176
1) $\snippet{name: long_division, x: 7218, y: 9}$
2) $\snippet{name: op_column, sign: '-', x: 900, y: 802, z: 98}$
3) $\snippet{name: column_multiplication, x: 98, y: 12}$

3926 : 13 * 8 + 2584 = 302 * 8 + 2584 = 2416 + 2584 = 5000
1) $\snippet{name: long_division, x: 3926, y: 13}$
2) $\snippet{name: column_multiplication, x: 302, y: 8}$
3) $\snippet{name: op_column, sign: '+', x: 2416, y: 2584, z: 5000}$

690 − 2944 : 64 * 15 = 690 − 46 * 15 = 690 − 690 = 0
1) $\snippet{name: long_division, x: 2944, y: 64}$
2) $\snippet{name: column_multiplication, x: 46, y: 15}$
3) $\snippet{name: op_column, sign: '-', x: 690, y: 690, z: 0}$