Ban Xia found it hard to understand.
BG4MXH said this was a complex physics problem.
The word physics sounds complex.
Complex physics problems, that's complexity squared, Ban Xia knew with her toes that she couldn't figure it out.
So she simply stopped thinking about it.
Let her toes stay comfortably in the slippers then; she had already been too hard on her toes by traveling all day, wouldn't it be too much to ask them to ponder problems?
It's time to wash her feet.
She bent her knees, pulled off both socks, tied them into a knot, and with a slight aim, she tossed them—they hit the target right at the head of the bed!
Ban Xia put on her slippers, dragged the washbasin out from under the bed, pulled the bare towel from the hook behind the door, and then carried the basin to the dark living room to pour hot water.
In October, when the weather was still hot, she didn't need much hot water to wash up.
