confusing multidimensional arrays

Heres a problem I came up with to try and explain my real problem:
Say I had a 5x5 grid of integers in an array (field[5][5]). The values are consecutive:

Code:

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1  2  3  4  5
6  7  8  9  10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25

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Now, since im trying to figure out what array element is what part in the grid, how would I output the number 6, 7, and 13, for example.

Code:

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const outputnumber = /* Insert your number here */

cout << field[outputnumber/5][outputnumber%5] << endl;  //Ahh! Almost forgot the ";"!

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Is this what you wanted?