Сравни.
980 : 5 и 15 * 15;
492 : 3 и 13 * 13;
810 : 18 и 720 : 12;
768 : 32 и 576 : 24.

980 : 5 < 15 * 15
$\snippet{name: long_division, x: 980, y: 5}$
$\snippet{name: column_multiplication, x: 15, y: 15}$
196 < 225
492 : 3 < 13 * 13
$\snippet{name: long_division, x: 492, y: 3}$
$\snippet{name: column_multiplication, x: 13, y: 13}$
164 < 169
810 : 18 < 720 : 12
$\snippet{name: long_division, x: 810, y: 18}$
$\snippet{name: long_division, x: 720, y: 12}$
45 < 60
768 : 32 и 576 : 24
$\snippet{name: long_division, x: 786, y: 32}$
$\snippet{name: long_division, x: 576, y: 24}$