The deca/penta tree

This is the deca tree promblem this is how it works. On a a deca tree One day a wood cutter came down and cut one trunk, one branch, one twig and one leave. How many leaves were left on the tree? You will see my working and then you will see my drawing of a penta tree. A penta tree is the same as a deca tree, except there is five trunks, on each trunk there are five branches,on each branch there are five twigs, on each twig there are five leaves. the strategie I used was subtraction  Here is my working: If this work is too small for you it says deca tree has ten thousand leaves, one thousand twigs one hundred branches and ten trunks. One trunks takes away ten branches = ninety branches, one hundred twigs = nine hundred and one thousand leaves = nine thousand. On branch takes away one branch = eighty nine twigs = eight hundred and ninety and one hundred leaves = eight thousand nine hundred. One twig takes away one twig = eight hundred and eighty nine and ten leaves = eight thousand eight hundred and ninety. One leave takes away one leave = eight thousand eight hundred and eighty nine ANSWER 8889 This is the penta tree