3 Digit (individual not multiplexed) 7 Segments Display

Hello, I'm trying to make a 0 to 999 counter with 3 individual 7 segments display but i didn't multiplexed the segments i buyed a chipkit max32 that has 82 I/O pins, and i connected the segments directly on the chipkit, the problem that i have is that i don't know how to combine the displays to work as one, and use it to show numbers from 0 to 999 i'm so lost, your help would be very apreciated.

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the problem that i have is that i don't know how to combine the displays to work as one

Hint: send the most significant digit of the number to be shown to the leftmost display and the least significant digit to the rightmost.