$510 \overset{3}{:} 17 \overset{5}{+} 14 \overset{4}{*} (48 \overset{2}{-} 80 \overset{1}{:} 4) = 422$
1) 80 : 4 = 20;
2) 48 − 20 = 28;
3)
$\snippet{name: column_multiplication, x: 14, y: 28}$;
4)
$\snippet{name: long_division, x: 510, y: 17}$;
5) 392 + 30 = 422.

$20 \overset{1}{*} 15 \overset{4}{+} 35 \overset{2}{*} 15 \overset{5}{-} 31110 \overset{3}{:} 51 = 215$
1) 20 * 15 = 300;
2)
$\snippet{name: column_multiplication, x: 35, y: 15}$;
3)
$\snippet{name: long_division, x: 31110, y: 51}$;
4) 300 + 525 = 825;
5) 825 − 610 = 215.