SI units are indicated by their own abbreviation, in case of centimetres, “cm”. Feet and inches are sometimes represented by ' and “ respectively because many lengths are given in both — for example, “six feet and one inch” is written 6'1”, because “6 ft.
Meet the toast hack so obvious it's almost stupid. To make a big batch of toast, lay a sheet tray on the lower rack of your oven and position the upper rack in the next slot. Place slices of bread on the tray, so that they stand up between the bars of the higher rack. Congrats, you've just created a giant toaster.
Store toasted bread short term in an oven set to low temperature up to 20-30 minutes. For longer storage, place cooled toast into an airtight container and store in the refrigerator up to 24 hours. Store a toasted sandwich by wrapping the cooled toast in a paper towel and place it into an airtight container.