Calculation of PCLK for UART (baud rate of 9600)

Can any one help me with calculation of PCLK for UART (baud rate of 9600)

According to datasheet if LPC2148 PLL calculations are as follows:
1.CCLK = M × FOSC
2.FCCO = CCLK × 2 × P

but they have not mentioned how to calculate PCLK.

Can any one help me with above calculation of PLCK

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