My DS is nearly 13 months old and is happy crawling & cruising about with moments of free standing.
I'm always in the same room as him (or following after him if he's going exploring) but I try to give him plenty of time for independent play with toys with me keeping a watchful eye. At the moment I don't try to do any major chores or tasks whilst he's with me and instead I save it all up for during his nap or after he's gone to bed. He used to be happy in his jumper in the kitchen for 5/10 mins at a time but since he started cruising he refused to go in it and I've just passed it on to a neighbour and plan to get an activity table or something else to go in it's place to keep him occupied. I tried putting him in a travel cot with some toys but he only lasts 1 or 2 mins before he wants to get out and roam around.
At what age could you be in the same room as your toddler doing a task or some chores whilst they played by themselves for a few mins?