4000 * 20 = 80000
 
5000 * 30 = 150000
 
160 * 500 − 17412 : 3 = 80000 − 5804 = 74196
$\snippet{name: op_column, sign: '×', x: '160    ', y: '500  ', z: '80000'}$
$\snippet{name: long_division, x: 17412, y: 3}$
$\snippet{name: op_column, sign: '-', x: '80000', y: '5804', z: '74196'}$