18 * x = 450
x = 450 : 18
x = 25
 
$\snippet{name: long_division, x: 450, y: 18}$

x * 23 = 2346
x = 2346 : 23
x = 102
 
$\snippet{name: long_division, x: 2346, y: 23}$

1190 : x = 34
x = 1190 : 34
x = 35
 
$\snippet{name: long_division, x: 1190, y: 34}$

x : 17 = 201
x = 201 * 17
x = 3417
 
$\snippet{name: column_multiplication, x: 201, y: 17}$

25 * x = 20200
x = 20200 : 25
x = 808
 
$\snippet{name: long_division, x: 20200, y: 25}$

21840 : x = 52
x = 21840 : 52
x = 420
 
$\snippet{name: long_division, x: 21840, y: 52}$