980081 + (341640 − 1263 * 209) = 980081 + (341640 − 263967) = 980081 + 77673 = 1057754
1) $\snippet{name: column_multiplication, x: 1263, y: 209}$
2) $\snippet{name: op_column, sign: '-', x: 341640, y: 263967, z: 77673}$
3) $\snippet{name: op_column, sign: '+', x: 980081, y: 77673, z: 1057754}$

400615 − (352203 − 2031 * 138) = 400615 − (352203 − 280278) = 400615 − 71925 = 328690
1) $\snippet{name: column_multiplication, x: 2031, y: 138}$
2) $\snippet{name: op_column, sign: '-', x: 352203, y: 280278, z: 71925}$
3) $\snippet{name: op_column, sign: '-', x: 400615, y: 71925, z: 328690}$