You probably got confused between Caloriescalories and Dietarydietary Calories, which are actually Kilokilo-Caloriescalories.
An Averageaverage person is on about 2,000 KCalkcal a day - which is Approxapproximately 8.37 million Joulesjoules.
700 Wattwatt-Hourshours is 2.52e+6 or 2.52 million joules.
For reference - that's about me doing a 35 minute jog on a treadmill at 9 kph.
On an equivalent of 2,000 KCalkcal per day - your robot needs 2324.444 Wattwatt-Hourshours of power.
However....
There are things we Humanshumans have to do, that your Robotrobot doesn't - we consume power even when we are sitting down, we have to keep our body temp within a specific range etc.
And that actually uses a lot of energy - so realistically, you could probably halve it and use 2x 700 watt-hour batteries for a 24 hour period.