15 * 4 = 60
13 * 6 = 78
17 * 2 = 34
21 * 3 = 63
11 * 8 = 88
14 * 7 = 98
Вычисления:
15 * 4 = (10 + 5) * 4 = 60
1) 10 * 4 = 40
2) 5 * 4 = 20
3) 40 + 20 = 60
$\snippet{name: op_column, sign: '+', x: '40', y: '20', z: '60'}$
13 * 6 = (3 + 10) * 6 = 78
1) 3 * 6 = 18
2) 10 * 6 = 60
3) 18 + 60 = 78
$\snippet{name: op_column, sign: '+', x: '18', y: '60', z: '78'}$
17 * 2 = (7 + 10) * 2 = 34
1) 7 * 2 = 14
2) 10 * 2 = 20
3) 14 + 20 = 34
$\snippet{name: op_column, sign: '+', x: '14', y: '20', z: '34'}$
21 * 3 = (1 + 20) * 3 = 63
1) 1 * 3 = 3
2) 20 * 3 = 60
3) 3 + 60 = 63
$\snippet{name: op_column, sign: '+', x: '3', y: '60', z: '63'}$
11 * 8 = (10 + 1) * 8 = 88
1) 10 * 8 = 80
2) 1 * 8 = 8
3) 80 + 8 = 88
$\snippet{name: op_column, sign: '+', x: '80', y: '8', z: '88'}$
14 * 7 = (10 + 4) * 7 = 98
1) 10 * 7 = 70
2) 4 * 7 = 28
3) 70 + 28 = 98
$\snippet{name: op_column, sign: '+', x: '70', y: '28', z: '98'}$