help to correct code speed meter , RPM and distance -pic 16f877 ( UART)

as i understand i wrote this code and i know its not correct and have some problem

can any one correct it please
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(( code in file attachment ))
pic16f877A --- result show in nextion lcd ( uart )
target of this code to show in nextion lcd speed ( km/h) and RPM and distance
important note ( wheel diameter 11 cm ) and one round = 36 puls
i use pin B0 ( int ) to count puls
and i used internal timer...

help to correct code speed meter , RPM and distance -pic 16f877 ( UART)