503 + 503 + 503 + 503 + 118 = 503 * 4 + 118 = 2012 + 118 = 2130

Вычисления:
$\snippet{name: column_multiplication, x: 503, y: 4}$
 
$\snippet{name: op_column, sign: '+', x: '2012', y: '118', z: '2130 '}$

515 + 515 + 215 + 215 + 215 = 515 * 2 + 215 * 3 = 1030 + 645 = 1675

Вычисления:
$\snippet{name: column_multiplication, x: 515, y: 2}$
 
$\snippet{name: column_multiplication, x: 215, y: 3}$
 
$\snippet{name: op_column, sign: '+', x: '1030', y: '645', z: '1675 '}$

2018 + 602 + 602 + 602 + 602 + 602 = 2018 + 602 * 5 = 2018 + 3010 = 5028

Вычисления:
$\snippet{name: column_multiplication, x: 602, y: 5}$
 
$\snippet{name: op_column, sign: '+', x: '2018', y: '3010', z: '5028 '}$

85 + 85 + 85 + 85 + 85 + 1250 + 1250 = 85 * 5 + 1250 * 2 = 425 + 2500 = 2925

Вычисления:
$\snippet{name: column_multiplication, x: 85, y: 5}$
 
$\snippet{name: column_multiplication, x: 1250, y: 2}$
 
$\snippet{name: op_column, sign: '+', x: '2500', y: '425', z: '2925 '}$