Multiple of Repdigit Base minus 1/Examples

Examples of Multiple of Repdigit Base minus 1

$4 \times 999$ base $10$

$4 \times 999$ (base $10$) is equal to $3996$.

$3 \times 6666$ base $7$

$3 \times 6666$ (base $7$) is equal to $26664$ (base $7$).