The lever principle is also called "lever balance condition". Power× power arm = resistance× resistance arm, expressed by algebraic expression as F 1_L 1=F2_L2.

Leverage, in a narrow sense, refers to "financial leverage". For example, if an enterprise is short of its own funds, it can borrow money to raise funds, put them into production and get more benefits. You can also say that you are using other people's money to do your own thing.

Leverage in a broad sense covers all economic behaviors of "taking small bets to make big ones", but the core is borrowing. For example, in the futures market, you have one dollar, but the market allows you to place an order of ten dollars. If you lose a dollar during the period, you will be forced to quit. That is, using a small amount of funds to manipulate a large amount of funds to amplify gains and losses is a tool to use small and broad.