Karina has a plot of 5,000 square meters in which she has decided that 60% of it will be used to plant vegetables. Of this part, 12% will be dedicated to planting lettuce. How much surface area of the plot will be used for cultivation?

First, let's calculate the area that will be used to plant vegetables. This is 60% of the total area, so we have: $$5000 \times 0.60 = 3000 \, \text{square meters}$$ Then, out of this area, 12% will be dedicated to planting lettuce. So, the area for lettuce cultivation is: $$3000 \times 0.12 = 360 \, \text{square meters}$$ So, **360 square meters** of the plot will be used for lettuce cultivation.