1 сут = 24 ч = (24 * 60) мин = 1440 мин = (1440 * 60) с = 86400 с
 
1 неделя = (1 сут * 7) = (86400 * 7) с = 604800 с
 
Вычисления:
$\snippet{name: column_multiplication, x: 24, y: 6}$
 
$\snippet{name: column_multiplication, x: 144, y: 6}$
 
$\snippet{name: column_multiplication, x: 86400, y: 7}$