231 * 4 = 924
$\snippet{name: column_multiplication, x: 231, y: 4}$
 
304 * 3 = 912
$\snippet{name: column_multiplication, x: 304, y: 3}$
 
129 * 6 = 774
$\snippet{name: column_multiplication, x: 129, y: 6}$
 
984 : 8 = 123
$\snippet{name: long_division, x: 984, y: 8}$
 
938 : 7 = 132
$\snippet{name: long_division, x: 938, y: 7}$
 
876 : 4 = 219
$\snippet{name: long_division, x: 876, y: 4}$
 
752 : 2 − 540 : 9 − 48 * 6 = 376 − 60 − 288 = 316 − 288 = 28
$\snippet{name: long_division, x: 752, y: 2}$
 
$\snippet{name: long_division, x: 540, y: 9}$
 
$\snippet{name: column_multiplication, x: 48, y: 6}$
 
$\snippet{name: op_column, sign: '-', x: 376, y: 60, z: 316}$
 
$\snippet{name: op_column, sign: '-', x: 316, y: 288, z: 28}$
 
(608 + 206) : 2 − 100 = 814 : 2 − 100 = 407 − 100 = 307
$\snippet{name: op_column, sign: '+', x: 608, y: 206, z: 814}$
 
$\snippet{name: long_division, x: 814, y: 2}$
 
$\snippet{name: op_column, sign: '-', x: 407, y: 100, z: 307}$
 
964 : 4 * 3 − 810 : 3 = 241 * 3 − 270 = 723 − 270 = 453
$\snippet{name: long_division, x: 964, y: 4}$
 
$\snippet{name: column_multiplication, x: 241, y: 3}$
 
$\snippet{name: long_division, x: 810, y: 3}$
 
$\snippet{name: op_column, sign: '-', x: 723, y: 270, z: 307}$