First you find out the number of miles there is. For that, you use the following calculation: 4 square plus 3 square equals diagonal square. which is 16 plus 9 equals diagonal square so root of 25 equals 5 So we add it all up: 4 plus 3 plus 5 equals 12 So he ran 12 miles altogether. Then: 12 times 105 equals 1260 calories.