13,3456789 * 3 + 99,7654321 * 3 + 766,666667 = 40,0370367 + 299,2962963 + 766,666667 = 339,333333 + 766,666667 = 1106
1) $\snippet{name: column_multiplication, x: 13.3456789, y: 3}$;
2) $\snippet{name: column_multiplication, x: 99,7654321, y: 3}$;
3) $\snippet{name: op_column, sign: '+', x: '40,0370367', y: '299,2962963', z: '339,3333330'}$;
4) $\snippet{name: op_column, sign: '+', x: '339,333333', y: '766,666667', z: '1106,0000000'}$.

7,6 * 0,25 + 290 : 1000 + 25,8 * 0,5 − 420 * 0,03 = 1,9 + 0,29 + 12,9 − 12,6 = 2,19 + 0,3 = 2,49
1) $\snippet{name: column_multiplication, x: 7.6, y: 0.25}$;
2) 290 : 1000 = 0,29;
3) $\snippet{name: column_multiplication, x: 25.8, y: 0.5}$;
4) ;
5) $\snippet{name: op_column, sign: '+', x: '1,9  ', y: '0,29', z: '2,19'}$;
6) $\snippet{name: op_column, sign: '+', x: '2,19', y: '12,9  ', z: '15,09'}$;
7) $\snippet{name: op_column, sign: '-', x: '15,09', y: '12,6', z: '2,49'}$.

5700 * 0,105 − 87 * 1,7 + 8009 : 1000 − 8009 * 0,001 = (598,5 − 147,9) + (8,009 − 8,009) = 450,6
1) ;
2) $\snippet{name: column_multiplication, x: 87, y: 1.7}$;
3) 8009 : 1000 = 8,009;
4) 8009 * 0,001 = 8,009;
5) $\snippet{name: op_column, sign: '-', x: '598,5', y: '147,9', z: '450,6'}$;
6) 8,009 − 8,009 = 0;
7) 450,6 + 0 = 450,6

5867 : 100 + 78,55 * 2,08 + 51,09 * 3,4 − 586,7 * 0,1 = (163,384 + 173,706) + (58,67 − 58,67) = 337,09
1) 5867 : 100 = 58,67;
2) ;
3) ;
4) 586,7 * 0,1 = 58,67;
5) $\snippet{name: op_column, sign: '+', x: '163,384', y: '173,706', z: '337,090'}$;
6) 58,67 − 58,67 = 0;
7) 337,09 + 0 = 337,09.