Here are some 'funny factorisations'. Complete the following expressions so that each one gives a four digit number as the product of two two digit numbers and uses the digits $2$ to $9$ once and only once.

** $\times$ ** $= 4876$

** $\times$ ** $= 5394$

Now do the same with the digits $1$ to $8$ to complete the
following expressions.

** $\times$ ** $= 1368$

$5$* $\times$ $6$* $=$ ****

$52$ $\times$ ** $=$ ****