Answer :
400/300 = 4/3 the water listed in the recipe
420g × 4/3 = 560g flour
21g × 4/3 = 28g salt
9g × 4/3 = 12g yeast
45ml × 4/3 = 60ml oil
420g × 4/3 = 560g flour
21g × 4/3 = 28g salt
9g × 4/3 = 12g yeast
45ml × 4/3 = 60ml oil