Linux Kernel division implementation

Linux Kernel division implementation-general Linux technology-Linux technology and application information. See the following for details. Recently, we have been developing modules in the Linux kernel. We need to collect and compare some information. For example, we have two numbers: 2000 and 1800. We want to obtain the ratio of two numbers through division and remainder, for example, if the value is 2000/1800 = 1, the ratio is regarded as, but Division operations cannot be performed in the kernel. I don't know how to replace it. If I think about the shift, it's hard to implement it, the/proc file system affects efficiency, so I would like to ask if there are any good methods to achieve it. Thank you !!