What do you ask about the calculation of Borg formula without any auxiliary tools? This situation can be calculated by referring to the formula itself.

The most commonly used method of index fund valuation is Borg formula. Borg formula: Long-term return rate of stock market = return on investment+speculative return rate = (dividend rate at initial investment time+profit growth rate during investment)+change rate of P/E ratio during investment.

Borg formula does not apply to all industry indexes, but only to indexes with stable profitability and predictable profit growth rate, such as medicine and consumer industries.