can you help me solve a question for my son

Here, we want to solve the equation
The question requires that the blank is filled
We have this as follows;
[tex]\begin{gathered} \frac{1}{2}\text{ divided by 3 = }\frac{\square}{2}\times\frac{1}{2} \\ \\ =\text{ }\frac{1}{2}\times\frac{1}{3}\text{ = }\frac{\square}{4} \\ \\ \frac{1}{6}=\frac{\square}{4} \end{gathered}[/tex]All we have to do now is to find a number that will make the two fractions equal
That will be;
[tex]\frac{4}{6}\text{ = }\frac{2}{3}[/tex]Hence, the number that should be in the blank is the fraction 2/3