☐ : 6 = 7 (ост.4)
☐ = 7 * 6 + 4
☐ = 42 + 4
☐ = 46
46 : 6 = 7 (ост.4)
 
☐ : 4 = 9 (ост.3)
☐ = 9 * 4 + 3
☐ = 36 + 3
☐ = 39
39 : 4 = 9 (ост.3)
 
65 : ☐ = 9 (ост. 2)
☐ = (65 − 2) : 9
☐ = 7
65 : 7 = 9 (ост.2)
 
54 : ☐ = 6 (ост. 6)
☐ = (54 − 6) : 6
☐ = 48 : 6
☐ = 8
54 : 8 = 6 (ост.6)