Both of the methods shown use diagrams to organise the information given. There are also good methods which do not use diagrams, but involve similar calculations.

$220\times36$ inches = $10\times44\times54$ barleycorns

$1$ inch = $\dfrac{10\times44\times54}{220\times36}=\dfrac{10\times(11\times4)\times(9\times6)}{(11\times2\times10)\times(9\times4)}=3$ barleycorns

$(54\times44)\div(22\times36) = (6\times9\times4\times11) \div (2\times11\times6\times 6)=3$

You can find more short problems, arranged by curriculum topic, in our short problems collection.