how to make me automatically calculate the ratio to the right when I enter a number on the left, and
automatically calculate the ratio to change when I enter on the right.
PS: when I try to use computed and watch,
watch listens for two variables, one of which changes the other, although the other has also changed, but they have been executed back and forth, and then become 0
do I want to add an intermediate quantity? But with the addition of an intermediate amount, how did the other two change automatically?
PSSSSSSSSSSSSSSSSSS: OK, my fault, I shouldn"t be listening to the values of two data
