3800 + 48 * ☐ = 7400
48 * ☐ = 7400 − 3800
48 * ☐ = 3600
☐ = 3600 : 48
☐ = 75
Проверка:
3800 + 48 * 75 = 3800 + 3600 = 7400
 
Вычисления:
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}3600\\ \phantom{0}\underset{¯}{336}\\ \phantom{0}\underset{¯}{\phantom{0}}240\\ \phantom{00}\underset{¯}{240}\\ \phantom{0000}0\end{array}& \begin{array}{l}\overline{)48}\\ \overline{\overline{)75}}\end{array}\end{array}$;
$\begin{array}{r}\times \underset{¯}{\begin{array}{r}48\\ 75\end{array}}\\ 240\\ 336\phantom{0}\\ \overline{3600}\end{array}$.