if NAV is Rs 100, you want to redeem 1000 units and the exit load declared by the mutual fund house is 1%.
So, the exit load will be = 1% X 1000 (number of units) X 100 (NAV) = Rs. 1000.
This amount will be deducted from the amounts receivable to you from the redemption of the units.
how the exit load is calculated