(8960 : 70 + 202) * 3 = (896 : 7 + 202) * 3 = (128 + 202) * 3 = 330 * 3 = 990
1) $\snippet{name: long_division, x: 896, y: 7}$;
2) 128 + 202 = 330;
3) 330 * 3 = 990.
 
10000 − 62400 : 400 * 28 = 10000 − 624 : 4 * 28 = 10000 − 156 * 28 = 10000 − 4368 = 5632
1) $\snippet{name: long_division, x: 624, y: 4}$;
2) $\snippet{name: column_multiplication, x: 156, y: 28}$;
3) $\snippet{name: op_column, sign: '-', x: '10000', y: '4368', z: '5632'}$.
 
50500 − (28 * 300 + 1600) − 6570 : 90 * 126 = 50500 − (8400 + 1600) − 657 : 9 * 126 = 50500 − 10000 − 73 * 126 = 40500 − 9198 = 31302
1) $\snippet{name: op_column, sign: '×', x: '28    ', y: '300', z: '8400 '}$;
2) 8400 + 1600 = 10000;
3) $\snippet{name: long_division, x: 657, y: 9}$;
4) $\snippet{name: column_multiplication, x: 126, y: 73}$;
5) 50500 − 10000 = 40500;
6) $\snippet{name: op_column, sign: '-', x: '40500', y: '9198', z: '31302'}$.