Entry Twenty-Eight: Lappy Toppy

Physics! So we are currently reviewing electric current and such. This laptop runs on electricity. It is plugged into the wall, and receives current. However, the voltage of the computer is much lower than the voltage of the power plant that supplies my house, but how come my computer does not short circuit due to the disparity of voltage? Transformers step down the voltage by using coils that reduce the voltage to something more manageable, like 120V. k.