Find the formula for the Riemann sum obtained by dividing the interval `[2,4]` into `n` equal subintervals and using the right endpoint for each `c_k`. Then take the limit of these sums as `n to oo` to calculate the area under the curve `f(x)=6 x` over `[2,4]`.

The area under the curve over `[2,4]` is square units.

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Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity