I'm living in an apartment. And our room is on the fourth floor.
I have been to the grocery store. And I bought a bottle of cooking alcohol and the one of mirin.
Each of them have a capacity of one litter.
And I bought another groceries except them. A pack of Tofu, one third of a pumpkin, one packing Nattou which contains three separated packs, one instant Yakisoba, etc.
My shopping bag in them was not so heavy when I carried it on the flat ground.
But when I went up the stairs with it, it was hard to carry it to the fourth floor.
Every time I go to the grocery store, I buy a lot of thing.
And I carry them to the fourth floor.
That makes my arms and legs sturdy.
Can you understand what I wrote in?