378 * 65 : 90 = 24570 : 90 = 273
1) $\snippet{name: column_multiplication, x: 378, y: 65}$;
2) $\snippet{name: long_division, x: 24570, y: 90}$.
 
495 * 32 : 80 = 15840 : 80 = 198
1) $\snippet{name: column_multiplication, x: 495, y: 32}$;
2) $\snippet{name: long_division, x: 15840, y: 80}$.
 
851 * 37 = 31487
$\snippet{name: column_multiplication, x: 851, y: 37}$
 
692 * 46 = 31832
$\snippet{name: column_multiplication, x: 692, y: 46}$
 
6 * 800 − 800 : 8 + 2 = 4800 − 100 + 2 = 4700 + 2 = 4702
 
6 * 800 − 800 : (8 + 2) = 4800 − 800 : 10 = 4800 − 80 = 4720