83 * 56 = 4648
$\snippet{name: column_multiplication, x: 83, y: 56}$
 
549 − 375 + 24 * 3 = 549 − 375 + 72 = 174 + 72 = 246
1) $\snippet{name: column_multiplication, x: 24, y: 3}$;
2) $\snippet{name: op_column, sign: '-', x: '549', y: '375', z: '174'}$;
3) $\snippet{name: op_column, sign: '+', x: '174', y: '72', z: '246'}$.
 
42 * 70 : 60 = 2940 : 60 = 49
1) $\snippet{name: column_multiplication, x: 42, y: 70}$;
2) $\snippet{name: long_division, x: 2940, y: 60}$.