9800 * 30
$\snippet{name: op_column, sign: '×', x: '9800 ', y: '30   ', z: '294000'}$
 
30200 − 7020 : 10 * 3 + 68 = 28094 + 68 = 28162
$\snippet{name: column_multiplication, x: 702, y: 3}$
$\snippet{name: op_column, sign: '-', x: '30200', y: '2106', z: '28094'}$
$\snippet{name: op_column, sign: '+', x: '28094', y: '68', z: '28162'}$