Eating extra calories if you have strength trained

I did 18 mins interval run/walking following 8 strength training exercises using barbell and dumbbells.

I only burned 180 calories doing the run/walk (before my treadmill cut out for some reason) ...

I know I've burned more calories with the strength training cos I only had 30 secs between sets and my HR was up....obviously I can't input calories burned unless I get my HR soon but what about eating those extra calories?

I'll prob go for another walk later, but I still needa get a small dinner at around 8pm (its 5pm now and I'm eating a post workout meal of 300 calories)

Whats your thoughts? I'm just a bit unsure about eating extra calories from strength training seeing as I;m unsure of how much I have burned