Answer
About 209 people per bench.
Work Step by Step
Let p be the number of people per bench.
$6p=1254$
Use mental math to estimate 200 people per bench. Create a table to find the solution for p.
$\underline p\ \ \ \ \ \ \ \ \underline{6p}$
$200\ \ \ \ 1200$
$201\ \ \ \ 1206$
$202\ \ \ \ 1212$
$203\ \ \ \ 1218$
$204\ \ \ \ 1224$
$205\ \ \ \ 1230$
$206\ \ \ \ 1236$
$207\ \ \ \ 1242$
$208\ \ \ \ 1248$
$209\ \ \ \ 1254\longrightarrow$ 209 is the solution