Question
Write periods of underlined digits:
$14563547$
$14563547$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.


| $1$ | $=$ | $1$ | $\times$ | $1$ |
| $121$ | $=$ | $11$ | $\times $ | $11$ |
| $12321$ | $=$ | $111$ | $\times $ | $111$ |
| $1234321$ | $=$ | $?$ | ||