numeral 'eight' can be used to the quantity of 'eight' units.
1. The baker had eight loaves of bread left in the store.
2. A pyramid can be built with eight stones.
3. The design required eight yards of fabric.
Be sure to capitalize the word 'Eight' when it begins a sentence. Also, it is not necessary to use an article ('a' or 'the') when referring to the number 8.