648 : (6 * 9) = (648 : 6) : 9 = 108 : 9 = 12
$\snippet{name: long_division, x: 648, y: 6}$
 
$\snippet{name: long_division, x: 108, y: 9}$
 
234 : (9 * 2) = (234 : 9) : 2 = 26 : 2 = 13
$\snippet{name: long_division, x: 234, y: 9}$
 
(310 − 180) * 4 = 130 * 4 = 520
$\snippet{name: column_multiplication, x: 130, y: 4}$
 
416 : 8 : 13 = 52 : 13 = 4
$\snippet{name: long_division, x: 416, y: 8}$